Dealing with Weak Hands and Feet Due to Small Fiber Neuropathy

My hands are weak and it frustrates me. I get exhausted trying to open jars sometimes. Any hand exercises or something to build up grip strength? My small fiber neuropathy makes it really hard to feel how strong I’m grabbing or pulling something. I can’t gauge it at all. Does anybody else have this problem? It can effect my feet as well, and sometimes I will brake too hard while driving because I can’t tell how hard I’m pressing on the pedal. Oh! And I can’t wear normal shoes because they rip the skin off my feet and leave wounds that take weeks to heal. The scars are still there from when I tried sneakers. I always need flip flops or some super cushioned boots for winter. My small fiber neuropathy effects my feet and hands, does anyone know anything that could have manage these symptoms?