What I would really want to focus on if money were not an issue is photography. Before the pandemic I had planned to build a darkroom in my basement. It seemed non-essential so I've put it on hold. When things start to go back to normal I won't feel guilty about hiring contractors to come to my house to help me indulge my hobby. Darkroom work is very time consuming but also very satisfying. Meditative even. You need a proper space for it and most importantly you need lots and lots of time.
I would also spend more time exercising, or at least as much time as I do now. Working from home has allowed me to replaced the time I would have spent commuting with getting more sleep and exercising 3-5 days (usually 5) a week. At the moment I think I am the strongest I've ever been. Not as fit as I was in my teens and early 20s, but definitely stronger and more disciplined. Anyway, what's the point in having free time to indulge yourself if you are too frail? I'd like to keep my momentum going and hopefully remain physically capable when I'm old.
I think I would want to get out of the house more. Go talk to people. Take pictures of people. Write about it. This was something I was passionate about long before coding became part of my life. Coding pays the bills and gives me money to spare so I can at least do some of this. I think it would be hard to eek out a living on something like this alone, but who knows?