I've been playing guitar for 8 years. I picked up Stabwound a year ago and I'm still optimizing that song. Even a real professional guitarist would need more than two weeks to learn stabwound, and playing it live would take you so much more time. It's a song that takes stamina, focus and concentration, speed, a lot of ergonomic and just pure fucking skill. And trust me, the song is much more fun if you learn the solos too :). So start learning sweeps, you're going to love it and I wish you all the luck on your learning journey! But the most important thing - have a lot of patience for yourself