I'm very glad to see that you are interested in creativity and are looking for new ways to relax and develop your artistic skills. I recently tried painting by numbers myself, and it turned out to be incredibly fun! If you're just starting out, I can confidently recommend the Arterium Store
https://arterium.store/ . This is just a treasure trove for all creativity lovers! They have a huge selection of paint by number kits, ranging from simple paintings for beginners to more complex ones for experienced artists. I especially like that their kits come with everything you need: a canvas with numbered segments, paints and brushes. This is very convenient, as you can immediately start drawing without wasting time looking for additional materials. The process of painting by numbers is very meditative and helps to relax perfectly after a long day.