You did a pretty good job up to the texture exercise, maybe it would have been more helpful if you had tuned in space those organic forms a bit more since they just look all the same.

I can see that in your first pages your form intersection are not really intersecting, they are mostly floating around so it really misses the point of the exercise.

Then your pages of organic forms stacks don't really look like they belong to the same space, maybe try to add more cast shadows to better describe the form of the organic forms below.