[Wooly]

All of the suggestions to look for a guitar with a wider nut which would equal wider string spacing are good. It seems to me that Yamaha with a 1 11/16 nut width tends to have even a narrower string spacing as compared to some other brands with the same nut width.

If worst comes to worst, you could switch to nylon string classical. 2" nut width is common with those guitars.

A fellow I played with had the tips of three fingers crushed on his fretting hand. Although being a right handed player, he learned to adapt by learning to play left handed and did quite well at it too.

Good luck and keep at it.