@Oric I found it easiest to work on scrap paper. I felt less guilty making art on old newsprint, packaging, or things I would throw away anyways.

Embrace the suck. Some people say you have a thousand bad paintings in you, and being an artist is about getting the bad ones out. Give yourself permission to make lots of bad art.

Do a sketch and move on. If you erase and re-make the same thing a ton, it feels like you're doing less and you lose evidence of your effort. You're making a bad drawing either way, give yourself permission for it to be bad, and try again fresh. That way, you'll at least see you've done twelve drawings, rather than one drawing with lots of erase smudges.

Also, you could take an art class. If you get your critique from an instructor, it might be easier for you to give yourself permission to not be your own critic, and to just focus on making things and doing your best.

If it's collegiate, the instructor will probably want you to learn how to take critique. Do let the instructor know about your situation and consider asking that they record their feedback for you so you can emotionally process it in private yourself. Taking critique is a messy process, but part of being an artist is engaging with critique in a healthy way.

In my experience, community education art instructors are very gentle and joyous, and can be critical enough that you can help quiet your inner critic. These classes are also usually less expensive.