Have you tried doing anything other than work that isn't consuming something?

I have, from drawing to music, from writing novels to doing programming projects on my free time.

It's not very fun, you aren't good at most of it and it's very frustrating. It's also very rewarding being able to overcome limitations and building up skills. But it's first and foremost very demanding. You can't expect someone that just got retired to suddenly spark in creative energy, even if they intimately wanted to do everything.

Personally if I do anything for 8+ hours a day 5 days a week it starts to feel like a job around 2 or 3 months in no matter how much I love it, and if I do much less than that I start to feel lacking in structure and progress.

I’ve gone through extended periods of unemployment (by choice, not in a stressful way) before, and it’s wonderful but by month 3 I’m always kinda over it.

Retirement for me will probably look pretty much the same as working except I won’t necessarily pick a job that pays well.