When I once tried to sew buttons onto some boots (to be precise: genshin impact il dottore boots... cosplay dads will know) at a very inaccessible spot, the thimble fell of my finger all the time and I pricked myself a million times, I designed this special thimble to stick on your middle phalanx instead of your finger tip.
Hold the needle with your thumb + index finger and support it on the ring finger by the thimble.