Hi gregorya,
Good work on your practices!
If you are okay with some feedback: I think you would benefit from doing a routine exercise (5-10 mins top, but you can do more if you want) drawing basic fundamental forms (cubes, cylinders, spheres, and triangles) over and over in a 2D and 3D space but with the goal of keeping your lines as clean and small (under a size 5-3, and draw as slow as you need) as possible to maximize your pen control.
I also like to do drawabox and think that could also be a benefit to you as well if you want to look into it.
Keep up the good work!