+1, I'd also recommend doing a low-poly lesson before attempting the donut tutorial. I did Imphenzia's low-poly tutorials after a few false starts with the donut tutorial, and found the low-poly approach to be much better at establishing a foundation for working with geometric primitives.

Imphenzia's channel is an incredible resource, even if you're not into low poly style he's just great at doing tutorials for both Blender and Unity. Plus just watching him do his modeling challenges teaches lots as you see all the little tricks he uses to get through them.

+1 from me as well.

Same channel author's vids on Unity are great too.