Hi Rythmrune! Congrats on starting this journey :) I'm not a TA, but I would love to take a look at your work!

Organic arrows: your arrows are flowing very nicely! Your linework is confident and it looks like you're applying the ghosting method for sure. You're also applying perspective in the positive space, with the end of the arrow coming towards you looking big and the one going away from you looking small. The only thing that I see missing is that you're not applying much perspective to the negative space, which is the spacing between the zig-zags of the ribbon. They should be bunched up closer when they're far away from you and spaced out more when they're closer to you.

Leaves: really good job! You're enclosing the leaves with simple curves and adding helpful contour lines. The 2nd leaf in the bottom row is my personal favorite, it flows very nicely in 3D space and the edge details are very good. I do see however that in other leaves, the edges/zig-zagging added are in one continuous stroke. I would recommend against it for reasons mentioned here: https://drawabox.com/lesson/3/2/zigzag.

Branches: these are looking great! You're drawing through your ellipses, keeping consistent widths and I don't see many visible tails. I also spot you changing the degree of the ellipses, which is awesome. Your lineweight here is pretty heavy, or atleast heavier than what I see in the arrows exercise, which makes me feel like you may have gone back over them with a second round of lines. I can't tell for sure though because some branches have a thinner lineweight. Definitely avoid that though, our goal is to develop the confidence to draw the line in 1 go and ghosting really helps with that. Apart from that, these are good to go!

Plant drawings: I'm really impressed with your plant drawings, I feel like you're doing a great job of starting with basic constructional shapes and then adding details over them, which is the goal of the exercise. Your petals and leaves flow very nicely in space, and you've added some really nice texture and shadows to things like the sunflower and the plumeria. My only critique here is that in the morning glory flower, while you drew the ellipse that encompasses the shape of the flower, you didn't construct flow lines for the petals. It's important to first establish the flow of the petals before adding the enclosing shape and texture to them.

All in all, you're doing a great job! Keep it up. I hope this review was helpful for you :)