So, where do I start?

GO LOOK AT PLANTS

Get out to a park or a creek and find some stuff. Wildflowers? Cool. Trees? Tall and cool. Weeds? Listen, take what you can get. Take some pictures with your phone. Enjoy it while you got it!

GEOCACHING

Do people still do this? I guess they do. There are websites for it. Hope you like digging through leaf-litter and tracking through mud to find buried plastic cases where you, too, can sign your name to a geocachers' notebook! If you're into that!

CROSS STITCH

Don't feel creative enough for freeform embroidery? Scared of the sewing machine? Good at counting squares? Get some embroidery thread and a cross stitch grid!

VIDEO GAMES

Play them on your phone! Play them on the computer! Play them on a tablet! Buy a thing to play them on specifically! You don't even have to play them yourself! Watch other people play them very fast for charity! Watch people mock games on the internet! Enter the vortex!

Try a different question.

You are bad at making decisions! But as your first hobby, you could go read some French literature, I guess. This guy Marcel Aymé wrote about a jerk who made some bad choices and got stuck in a wall. Don't end up as a physical representation of a heavy-handed metaphor! Don't make bad choices! Get back up there and pick a real answer!