Frequently filing the nails can also work to prevent needing to clip them.

Maybe I could help with my own way?

Hmm. When I cut mine in the dark (yeah I can see so sorry if this isn't a great methold I don't mean to upset anyone) I just guide the clippers across my toe itself below the nail. Then round off the edges by stabbing my finger against it and clipping til it's smooth. You can tell by how uncomfortable the pressure of the clippers against the underside of your toes to tell how short it will go. It should feel a tad cold but not like your crushing your toe. To learn a ballpark you can squash your underside of each toe into the nail to figure out how long and how comfortable a trim will be.

I was born with Hypermobility syndrome which is very similar to what you have and now can't bend the way I used to either. Now I trim exclusively by feel because arranging a position where I can get a good cut tends to mean I have no eyeline of my toes (plus I often only realise they need to be trimmed when I am in bed and accidently stabbed myself so quickly lob off the offending parts in the dark and then lie down and go to sleep. I hope you find a methold that works for you, trying to streach when you can't safely do so anymore means your super likely to get hurt so please don't feel like you should force yourself.

Very very carefully

Not super helpful but by asking my SO to do it for me. I get a pedicure a few times a year. Helps clean everything up.
Also, it’s easier to do it when they are wet.

I don't. I let my local NHS chiropodist do it for me.

put the clippers on your toe, using your fingers to guide, and just clip. if its wrong, you'll feel it before you clip. you could also do the squeeze, squeeze, clip method, just to make sure.

I have the same problem. Recently started going for a pedicure every 3-4 weeks. I didn’t know about the massage chair and the foot massage after. I highly recommend this strategy. :)

This is so funny, I remember asking myself the same question. I've found that using the larger sized nail clippers makes this a lot easier. What I do is put a fingertip from my non-clipper hand on the edge of my nail to use as a guide for the clippers. Once you get a feel for it, you'll be clipping your nails as quick as ever in no time.

This seems like the easiest thing to do by feel...people are really obsessed with doing everything by sight.