Wow, Tanvir, applause for you! Very fine work thus far.
I agree with others here that you do a good job with self-critique. I never used to do that myself until I took a Spencerian course and we were taught to critique our homework in the last 2 sessions. It's a very useful skill to have, especially when learning on your own.
I have a similar issue of controlling shades on downstrokes, but that will come with time. You're aware of it, and will work towards improvement. Overall, you seem to have very consistent control on your shades. Some of the letters seem crowded, so working on rhythm drills might help there.
A fun thing to do would be to date this sheet. Carry on with your progress, and then check back in 3-6 months, and write the same words. It'll help you see where you still need improvement and where you've resolved issues.
Hope that helps! I think you're definitely ready for the FF exchanges.
Janice