i disagree with the above answer: youre clearly a rookie, and classical gas is an advanced song, so anyone suggesting stuff like through fire and flames dosent know what theyre talking about.
now, here is a vital lesson in music: being a rhythm player is more important than being a solo guitarist, because without a rhythm, most (i say most because a rhythm guitar isnt always vital) solo guitarists are just going mental-fast around scales without a background: boring, and easy to come out of time.
so, play something that has a diverse range of rhythm and solo, particulalrly if it has an odd time signature. dont play anything too advanced for yourself.
the jam in Am is an excellent choice, just use some dominant 7th chords instead, or a shuffle (google the aformentioned). and if anyone asks why you arent soloing, explain that rhythm is much more important than solo. unless theyre idiots (lol), this may turn them in your favour.
soloing; soloing uses multipule scales, mainly the following in order of importance: pentationics, scales, arpeggios. obviously you need chords to solo over, but dont worry about that for the moment. now, learn pentatonics: practise them over and over, and over time, you WILL develop them into somethign you can solo over because yoll learn what sounds good. then move onto scales (moveable). do the same; frequent practise.
now, some songs for rhythm. time of your life – green day, a generic blues shuffle, paradise city – GNR including riffs for a bit of showmanship 
, a SLOWED DOWN and simplified version of rude mood by SRV. SLOW IT DOWN and simplify it or you will sound sh!te, theres no way youll be able to play at 260 bpm after 10 months.
good luck 
