>trying to learn a song >can't go as fast as the song

Practice scales

you have to make yourself go slightly faster than you comfortably can so that it hurts until you're too tired to continue doing it. you just keep doing that and over time you'll get faster

play it slow first and then increase speed slowly

>>74577096

Use a metronome, and slowly increase the speed.

Also, fuck you, just play Doom Metal.

In case anybody's wondering, it's that faster bit in Hallowed Be thy Name, tough as shit.

>>74577096
play it slower and then you can play faster

work up to it, don't just dive into something you know damn well you can't do yet and expect to make progress by furrowing your brow and punching yourself instead of starting at a speed you can actually play and building from there