I own a Gretch semi-acoustic, which suffers from neck drop, and have difficulty holding the guitar at the right angle (slightly up to allow relatively easy finger movement on the fretboard) with my left arm (as described by Justin in his grade 1 course). I prefer to stand while playing so cannot rest it on my left leg. Any ideas?
I don’t have my own experience with this, but I assume you use a strap. Some straps attach at the neck/head just past the nut. I have heard of people using a shoelace or string to tie them there. That probably helps with head drop more than attaching at the body.
There are items that you can slide onto the strap that add a lot more friction so to speak, bit like heavy guitar padding type pieces. Although designed to add padding they are a very tight fit on the straps which I found help to stop teh droop lol.
As others have suggested, a quality strap can help.
The other important factor is that when you’re playing standing up, you need to pin the guitar to your body with your right forearm to hold it in place. Some guitars have headstock dive more than others, but all guitars move around. It might be a bit tricky to do that early on, if so, try sitting down. Still need to pin it in place with your right arm, but less effort.