A lot of what I'd recommend depends on what you'd like, how much time and energy you want to invest, and what you find interesting. Since you haven't given any guardrails here is a random smattering of what I or the people around me do/have done. We are all kinda of people so maybe something will strike your fancy.
- when DH retired DH taught himself to weld because he wanted our yard to have big metal dinosaurs in it. He was a lab tech so this was very new. Now, years later, our yard is full of all kinds of wonderful art and every year his skill improves.
- a friend gets together with his family to make port pillows for people with cancer so they can wear their seatbelts in comfort. They are small, simple and easy to make. It is a big social even (big family), an excuse to get together and do something good.
-a friend goes to visit a public art display in the city every week. Big or small, find something new and go check it out.
- DH and I do a version of visiting art, but we only visit silly things - upright cars , largest ball of paint, houses that look like castles etc.
- DH and I like to visit little libraries. We have one, but we are always on the lookout for unique designs or improvements.
-a friend of mine hosts crafting circles at her house. Bring a project, work on project, get help and share.
- I run a table top game and have for a long time, a fun way to spend time with old friends and make new ones. Many gaming stores run games.
- I've built large costumes and sets out of cheap easy to find materials and even done conventions and competitioms. I've also taught others how to do this.
-a lot of types of volunteering, it comes.itnso.mamy flavors,.it's amazing
- I've grown historical sourdough starters you can order from historical societies.
- one of our neighbors does blacksmithing - we live in the suburbs so that is really strange
- Mother in law has taken up bird watching, especially locally. Her state parks have a lot of free programs about local.birds and will do bird walks.
- mother in law is rocking her local parks, they also had a snow shoeing class so she took that last year and at the age of 72 learned to snow shoe.
- I went through a phase where wanted to find new recipes that were good enough to add to the regular rotation. It took some doing, but I got some good ones that now get made a lot.
And on and on and on. We have access to so many resources, it might be there are so many choices, picking one to go with is big.
Loren