Looking for a challenge

I like to have a challenge in my life, something to start and complete as it gives me the feeling of accomplishment. When I have goals I feel good when they are reached, and even if I start a challenge or goal and I don’t reach it, I still feel accomplished as I have interacted with others and also see it as a journey.

It would be good to find something to get into so that I am accountable. My question is how do I decide on something meaningful or where do I start?

I have looked into taking classes at nearby college but when looking at their classes I don’t see anything that feels challenging for me.

If I don’t have a challenge or a goal I don’t do as well so it seems to be what I need.