You’re almost there. Resist rushing through it. Take your time. Take a break. Keep going. Do it well. Reward yourself. Get that completion dopamine, then enjoy a sweet treat for your efforts (or whatever feels nice to you). Soon you’ll have a body of work. It feels good to see it accumulate.
Pick a project, that’s small but meaningful, and pursue it. Something you can do in a few days but will give you a sense of accomplishment. In the past, I’ve tended to use small series of paintings or series of small paintings for this