@Antje77 , don't worry about getting bored with controlling your diabetes. You can bet your boots that things will not always run smoothly, whether it's illness, broken bones, new forms of exercise, stress or even changing seasons, there will always be something to keep you on your toes.
Things change, sometimes for no apparent reason. Above, I mentioned changing seasons. The first time I read someone on the forum having to raise/reduce insulin, due to the changing seasons, I laughed and thought it was nonsense. Now I know better, as a few years later, I had to start changing my basal rates when seasons changed.
As for hobbies, why stick to one? I dance, read, knit, crochet, draw and paint. When I can't find something nice to wear, I even consider getting my sewing machine out, but haven't done so yet.
Don't worry, you'll be fine. A few hats to match the socks for the sheep and you'll never want to stop. What about making natural dye for the wool, to match the "woolmark" on the sheep?