Eh, having also had a bout with one of the weird forms of melanoma (nailbed, not ocular): I decided while recovering that I'd much rather go out because a truck pasted me to the pavement on a brevet than in a hospital, and the heck with it, I'm doing things I enjoy, like riding brevets. If my body is a time bomb, I'm going to enjoy it while it lasts. I am *very* careful with sunscreen and wear UPF-rated long sleeves now (I often did before, just because getting burnt while riding is miserable, but now any ride over a couple hours I never go short-sleeved), even though the form I had isn't sun-exposure linked, but the docs thought it was a good idea.
Hope you've healed well and good luck. It's a scary experience, having the big C.