Canvas isn’t too expensive from Amazon or Costco, and you can get plain old acrylic paint from Michaels. I got a cheap brush set from Costco, a bunch of plastic cups from Target for soaking them while I’m painting, and plain paper plates for palettes. If you ever want to get a feel for painting, there are plenty of paint and sip places around the US that will let you try out either a standard (weekly or session-based) painting or a custom one (my partner and I have painted our dog 6 times so far and have a dedicated art wall for the little goober) and also you can drink wine while you do it! I tend to do smaller pieces (usually 8x8 since I also take some to work to decorate my cubicle) and just use command strips to apply them to the walls in our apartment, but you can absolutely take the time to mount them properly with nails and wire if you want.

I genuinely can’t recommend it enough. If you want to make things truly BIFL, you can put a layer of polyurethane over them to prevent any flaking. I haven’t had any yet, but I’ve only been doing this for 3-4 years so far. My grandmother was a painter and used acrylic for about 50 years and her paintings have held up perfectly this whole time. I have one she made when I was born (almost 30 years ago) that is still pristine.