Great week 1 work @ketre! Bushes are not an easy task so I respect you for tackling a challenge.
If I’m honest, I prefer your earlier bush tests than what I see in the homework submission:
To me these read more bushy. They’re a bit high in contrast but the shape and appeal is much better imo. The only thing that’s lacking is a “leafy-ness”. The blobby bumps work well at a glance but for foreground bushes, the illusion breaks down fairly quick.
Perhaps a layer of alpha-mapped cards on the outside of the bush could finalize the effect. Here’s a video touching on the technique:
It’s not Blender unfortunately but hopefully the concept is clear enough to imagine implementing with your bushes.