Starting is hard. Do a diary and see where that takes you. Don't buy expensive stuff first. A simple lined notebook and a cheap fountain pen. I found myself buying things for hobbies, spending money but not time and effort. Nowadays, if anything, I buy books and study. When I have the habits in place, i'll learn how to paint.

If you're afraid of making that first entry in your beautiful new notebook, turn it upside down, flip it around and make a few trivial entries or notes in the back of the notebook. Once it's no longer blank, using the notebook for its intended purpose will be a lot easier.