first thing, good job on starting drawing, but keep in mind this is a skill which will take years to train and develop, so be patient.

so - I can see some wobbling with your linework, especially evident in where we can see your lines wobble back and forth in ghosted planes - remember to focus on confident and smooth linework, ghosting and then drawing through. accuracy is not your priority, focus instead on confident/smooth lines and let accuracy come with practice. I can see in some ghosted and superimposed that your lines are arcing in one direction, as a remedy for this try to consciously push your arm in the opposite direction. no need to re-do, next drawing session re practice these 3 exercises in smaller bites for a total of 15 minutes as a quick warmup (which you should do before each drawing session in the future, picking 2-3 random exercises out of a warmup pool from exercises you've completed so far)