simple things! basic geometric shapes like squares and circles, draw two dots and try to draw a straight line between them, numbers and the upper case alphabet- anything you can think of that isn’t so complicated you get distract by the final concept; what you’re learning is motor control, not ‘how to draw’. You’re making new roadways in your brain, and that takes time! so just take it slow and steady- a little in the morning, a little in the evening, every day every day every day. I do things like that even now, with both hands! It makes for a good warm up.