These look excellent. When it comes to connecting your lines, the way you have done it is fine for this assignment. Try keeping your lines a bit lighter as you lay them in and then slowing down to add a darker line in the areas where your lines connect. I personally think your lines have really nice energy. For this type of drawing you won’t get perfect proportions so don’t stress about it too much. These are very successful, nice work!

I like your line quality.

I think you are on the right track. You're doing a great job implementing CSI lines and you have a good understanding of gesture. At the risk of sounding cliche, keep practicing this skill. You seem to be at the stage where getting the mileage is going to benefit you the most. I think it's a good idea to keep a small sketchbook at all times and draw shapes from life if you can. Practice drawing dynamic shapes from imagination as well. You can draw seals or anything else that you find enjoyable to draw. Keep up the good work 👍