I think your Lines are really solid and have improved from the first image to the last. Also the Spatial awareness you have when doing the organic perspective exercise is great! My only feedback is when doing the Elipses, make sure you are turning your page, the angle of the elipse will follow the direction of your wrist. I also see that some of your elipses are not complete ( I don't know if you ran out of ink!) but try putting a bit more pressure down on the pen and remember to keep the momentum in the shoulder!

For the Rough perspective exercise I see that some of the boxes have wobbly lines make sure you are taking your time when ghosting.

you're doing Amazing work! I look forward to seeing more of your posts.