As a bit of a 'hobbies butterfly' I like to try different styles & techniques.
One I have a great deal of fun with is encaustic wax. It's amazing what you can create with a small iron, a few sticks of wax & some shiny paper.
The simplest techniques will give you a myriad of abstract patterns and you can progress to more realistic work if you so choose.
I mostly work on 6”x4” or 5”x7” paper & either mount & frame them or turn them into cards.
Cards and mounted work are for sale on my ETSY shop