Hi, I just started learning electric guitar but I can't play it while sitting. I put the body on the right leg but the neck slides away when I play, I can play only with the strap very short, and the guitar not touching the leg.

I can't do the spider exercise as well, so I'm getting I little demoralized.

I've been trying for 3 days but can't do it yet.

Should I skip it and train on the chords?

Any advice?