Thinking about giving up on guitar

I started playing guitar 3 days ago. I have gotten really good at Guitar Hero over the years so I figured the real deal would be a cake walk. I could play “Through the Fire and Flames” on Expert for example. So I picked up a Les Paul with my Dad’s credit card cuz I ain’t no broke boy (like you probably) who plays and Epiphone or a Squire, and I learned about this cool thing called tablature. With tablature I wouldn’t have to learn how to read music, or theory god forbid, because it’s just the fret number on the string you need to play like Guitar Hero. Anywho, I looked up the tab for Through the Fire and Flames and set my metronome to the tempo it said at the top, and got dam it’s impossible to play. How tf do you people do this? I eventually gave up on that song thinking I should start with something easier. I hear all the time that tapping sounds hard but it’s actually very easy, so I looked up the tab for Eruption. Eruption is impossible to play too! I’m honestly at a loss at this point so I’ll probably just keep this Les Paul on top of my entertainment center for motivation whilst I play Guitar Hero, which I’m probably better at than you.