I'm fairly new to guitar and i need some help.
First off, i'm playing an acoustic guitar. I'm not a beginner yet not a master. I've been playing for a few months, i know a few scales, a dozen of riffs, a dozen of chords, i'd say i'm still starting out on guitar.
But recently i've came across a problem. When i focus on strumming, i screw up on fingering and generally fast playing. But, i'm strumming in an usual pattern. Only down, not up. I've came to this conclusion the following way:
I am learning the main riff of AC/DC's Thunderstruck. I'm currently using a metronome and playing at 90 BMP. I'm still building up speed. I'm learning it by picking and then doing a pull off, I'm picking one fret then the next note is a pull off. (I basically play it on the B string, frets (pt 1) 4-0-2-0 - (pt 2) 5-0-2-0; and every open string is a pull off). I know that in the original recording the player uses hammer-ons and pull-offs, but currently such fast combination of hammer-ons is too difficult for me.
So, let's get back to the strumming. I've noticed that i start hitting the wrong notes sometimes, and also at times i'm not doing the pull-off correctly.
My hammer-ons don't sound the best, but just to improvise, i used hammer-ons and pull-offs. I could play at a much faster rate than when i was picking. When picking i can go up to maybe 100BPM and be comfortable with it, but i think i was playing with hammer-ons and pull-offs at around 120 maybe. I noticed that it's quite a lot faster than when i pick. As i said, the only problem with this one is that i can't do hammer-ons that sound proper, they sound quieter than they should.
In conclusion, even the most basic picking pattern can distract me from proper fingering. How should i resolve this issue?