If you NEED to relax by doing something constructive with your hands, or you just want to develop a new skill, consider:
Cookie and cake decorating
Learning to knit or crochet
Surface pattern design (digital)
The art of looming
Painting picture or an ornament
Creating bath bombs
Creating greeting cards
...and so much more...
This is a wonderful way to escape from the stresses of the present, the past, or the future.
Some handmade product can be made for the purpose of accomplishing community service hours.