francy57
I didn't understand what you said but yes E on the 5th fret is A. See this.

These are all the chords positions I'm talking about (minus F which is shown in a sub optimal position here). The E chord is called E because the note you play on the lowest string is E. But, if you put a capo on 5th fret (or bar), and play this position, you'll get an A, since the note on the lowest string will be A. You can verify it: put the capo on the 5th fret and play the E position there. Then, remove the capo and play A as open chord. You will hear the same notes. Is it clear ?
Gigachad
I actually suck at music theory myself, I hated it so much I skipped all my classes. It was so damn boring, we would spend all our time doing notes and rhythm dictations, and sing the most boring notes and rhythms. But... I still managed to pass the exams on the +10 years of classes so I know the basics for sure lol. But I don't know much about electric guitar and shredding with a pick, and also it was a long time ago so my advices might be too advanced or not clear enough. Also, despite being able to play and sing I cannot compose music for some reason. I just cannot come up with anything original. For memorizing tablatures, I recommend memorizing the chords of the melody and not just the notes, that is way easier.