Hi Richard, I tried to comment on Justin’s how to hold video but it wouldn’t let me. You mentioned this thread there so I thought I’d try here.
Im a newbie on grade 1 and been working on a good relaxed position for my guitar. I tried classical with a foot stool for a bit but I find my legs/feet relax better with my feet on the ground. I bought a lower stool. However I’ve been thinking (maybe overthinking) about the angle of my thighs. They slant down a bit and it seems that 90° or slightly up is better. I can do this but then I’m back to my footstool. Before I look for a lower stool, I’m wondering if you think leg position is critical for playing and staying relaxed.