Demos are not free for ever.
I have never used amp simulator software, so that part I cannot recommend for or against.

There is no guarantee that your line in will sound any better than your mic in. Though, if you have both on the same card, the line in SHOULD sound better, but that's relative. They could both sound bad!

There's a LOT more to it that just plugging in your guitar, as many have found. Remember, your soundcard, unless designed for recording music, was probably designed for playing games. Difficult to expect any musical quality from something that's trying to do a job it wasn't really designed to do in the first place!

No, I wrote it bad.
I didn't mean I have a Line In on my PC.
I was saying that i plugged a cable like this.
Amp Line Out> PC Mic in

And it didn't work out, only buzz buzz buzz.
USB interface rocks, though.

Getting something that will serve you well for home recording isn't all that difficult. Unfortunately, the "industry" that produces all this recording gear is convincing people they can do it at home and avoid high studio costs. I've known a lot of people who got lucky and made a GREAT recording the first time out, but never seem to be able to repeat the feat.

Here's what the studio has that the average home recordist does not:

A room designed to record in. A well designed room is worth it's weight in gold to a recording studio. Fully 50% of our job as engineers is made easier, or impossible, by the room we record in. Draping blankets, mattresses, carpet, egg cartons and the like on your walls, does not create a good recording space, just a dead space. While it's easier to record in a dead space, putting the "life" back in the music is nearly impossible. You're missing the natural reverb and along with that many frequencies that are absorbed by whatever you cover the walls with. There are a LOT of other drawbacks to recording in the wrong room... Bass buildup, flutter echo, standing waves, frequency loss, frequency multiplicity, and more. Electrical can also be an issue for many. Having a fully voltage regulated space with fully shielded cabling, (electrical cabling that is,) and isolated grounds will eliminate any issues from power noise. Aside from the room, a good SELECTION of pre-amplifiers is absolutely necessary. These do impart tone to your recordings and having a selection allows you to mix and match different flavors. A good SELECTION of mics is also necessary. If you record everything through the same mic and pre, you might as well use the same amp and cab too as you're not going to be able to vary the sound all that much. Even for the most basic setup, you'll spend another $2-3K on these items.

Once you have all the gear, learning how to use it is another story altogether. Even engineers with years of experience learn something new every day. (At least MINE better!) When it comes to mixing, making sure all your tracks fit together and "sparkle" is more than a happy accident. Compression settings, EQ, effects, etc., all contribute to the final result, good or bad. Knowing how to do these things takes time to learn if you're being taught and even longer if you're trying to figure it out yourself. All the tricks you may collect to make a good track shine, when applied to a bad track will make it sound worse! There is no defined "miracle" setting that will work in all instances. Just like the so-called "mastering software" I've seen on the market that claims you can make your mix sound like, AC/DC, Floyd, Zep, or a multitude of others just with selecting a switch or button, is all a load of crap. There are far too many DETAILS that need to be addressed that either result in the music coming to life or dying a quick and probably welcome death.

Playing and recording yourself at home is one thing. Thinking you can do as well as a studio using a BOSS recorder or computer and a few SM58's is another. Don't even go into ProTools here... I can't tell you how many times I hear, "We have ProTools! We'll just fix it in the mix!" This is MORE than stupid. It's gotten the amature recordist thinking he can dance with the pros and it's just not true. If you get it right up front, there is no need to "fix it in the mix." There is no "emulator" that will make an SM58 sound like a U87. There is no emulator that will make your voice sound like Freddy Mercury. There is no emulator that really sounds like the real thing. It's just an emulator. (Yeah, cute to play with and they do change the sound, but realize that it's like immitation cheese compared to the real thing.) For the average ear this may all be fine, but to the pro, everything lacking shines in detail screaming "amature recording!"

I'm not trying to disuade anyone from recording themselves at home. I believe it's one of the best things you can do if you're looking to improve your playing and that's what it should be about. If you're serious about making a CD, you should consider the studio instead of trying to do it yourself. If you add up the costs of the basics you need to get a decent sound, and the time it will take you to figure it out, learn proper mic placements for all the different instruments and vocals, you'll find that it's cheaper to go to a studio and let them worrry about getting the sound YOU want, (yeah, a lot of studios will push you around and give you a lot of technical "reasons" they can't get the sound you want, but those "reasons" are usually excuses because they don't have a clue what they're doing either, or just don't want to spend the time to get it right.) Just keep on your project if you put it in the hands of a studio and INSIST on having things the way you want. A GOOD engineer will provide you with options instead of "This is how it is. Take it or leave it."

Remember, you're always welcome to ask me what's a crock and what isn't. Sometimes it's hard to tell since I can't actually SEE what is being done, but the more information you can pass along with your question, the more accurate I can be with an answer.

Thank you all very much for your help! I Appreciate it !
Have a nice and talk to you soon !