For firearms skills, I practice regularly and teach. I don’t worry about how much effort I should put into practicing — some people golf, others race cars, and I spend my “hobby” money on firearms classes and practice.

For medical skills, I’m grateful to not be practicing them regularly as a non-professional. While I’d love to get trained as an EMT or higher and work part time in that field, it’s not practical for me. What I can do is take a CoTCCC course approximately annually, and other courses as I find them. “Doc Bones and Nurse Amy” (no affiliation) put on a really good austere medicine class in addition to their excellent books and other content.