Honestly Vans or Desert Boots look really nice with raw denim. Pumas don't really go well with them but that's just my opinion and my own taste.
I wouldn't say boots aren't fitting for a gr.11. You'll get weirder looks wearing pumas with them than with boots.
For myself, I wouldn't get 2 pairs of raw denim right away as I'd want to work on the fades on 1 than alternating or w.e everyday. Fades will show up faster since you'll be wearing them most of the time.
Grab your self a few shirts or a nice belt instead.
Natural leather belts turn out really great, it's just the beginning that it looks "weird" because it's that pinkish tan color at first.
Tanner Goods(left) and Corter Leather(right, after 1.5 years) make really nice belts
Wear the jeans + belt + shoes and they'll age together nicely, it'll be worth it!
Check out
http://blog.abcdenim.com as well it's a really great source for raw denim