Hello Lostinwonderland541: Well... I'm an older person at this point. But I can certainly relate to what you wrote about starting & ending so many different hobbies, etc. Over the years, I dabbled in so many things I hate to even think about it. And my dabbling has also cost me a lot of money as well.

And, although I've now been married for over 30 years, (my wife's accomplishment... not mine) I am also short tempered & easily irritated... although I'm working in it...
I think a lot of the cause of this, at least in my case, has been a lack of satisfaction with myself... always feeling an emptiness inside... like there's just something fundamental missing within my persona. Plus I have also struggled with ongoing anxiety & depression. It has made for a toxic brew...

For many years, I was simply deep in denial. And by the time I was finally ready to concede defeat & get the help I had always needed, it was too late... from a variety of perspectives.
The great thing, in your case, is that you recognize you have a problem. This is to be celebrated!

And, with that knowledge in hand, hopefully you will be able to find the help you need in order to resolve whatever it is that is driving your restlessness, short-temperedness & irritability. I send hugs your way with the hope that it might be so.