I suggest you continue lessons but with a teacher who can incorporate basic music theory skills that you can apply to your lessons. I would also suggest you spend some time in the music theory forum board and post questions you have.
Chord/scale relationships are important to understand and will help you better understand the fretboard. Learning intervals is very important to chord buliding, understand how chords are formed and built. Learning how the major and minor keys work will help you understand what chords go with certain keys and whether or not to play them as major, minor, diminished or augmented....you;ll also,learn how to build expanded chords like 7ths, 9ths, 13ths.....
As far as scales go, learn the major scale. This is the mother of all scales and inside the major scale you will find the pentatonics, blues, and all mode scales ( for lack of better terms)....you will learn the modes are "sounds", not scales, confirmed by the chords in which you play underneath the scale.
Scale Drills and more drills.....practice your scales all over the fretboard, not just 1 position on the neck ( guitar players biggest mistake). Prartice alternate picking up and down the scale, build your speed over time. Practice hammer on's, pull-off's, trills, etc.....
Gosh...I could go on and on. I suggest you tap into some music theory and try to find a teacher/instructor who can show you applied theory to the guitar.
Good luck and don't give up. Keep at it. Take little bites at a time.
S.
