I’d keep crocheting, to be honest. Needlecrafts are to be recommended for pain management: many people with arthritis and other hand pain report considerable relief from pain due to knitting or crochet.
It might be worth investigating different hooks. Some people with arthritis find simply switching from metal hooks to wood or bamboo is enough. There are many ergonomic hooks on the market today which some people swear by. One example is Knit Picks Amour hooks, which have a contoured rubber handle, and are available in large (wool) and steel (lace) sizes. These are great if you normally hold the hook in a knife hold. If you’re a pencil-hold crocheter, you might be better with Addi’s basic grip hooks, which have a thicker pen-like handle that doesn’t need the tight grip of basic metal hooks. I’ve also heard good things about Furls hooks, but can’t comment myself.
Alternatively, you can purchase ergonomic handles for the hooks you already have. The Eleggant hook and handle set is recommended for hand therapy. There’s also the Boye Crochet Dude handle:
Some crocheters even craft their own ‘perfect’ handles using Fimo, Sculpey, resin, etc (a possible crafting substitute – and income stream!). I’ve also heard of people using pen grips!
If crochet is genuinely beyond you now, you might consider weaving – shuttles being substantially larger than hooks – needle-felting, or nuno felting:
Or a combination of all three. A fibre artist friend of mine produces some true works of art this way, incorporating fleece, wool, silk, bark and found objects into her tapestries.