>>362081835
I wasn't the blender note guy, a different anon, but Booth models are fairly complete. Basically you open the package in unity then its ready to upload. Most author's will include PSD files and etc. so if you want to do color edits its not too hard if you're familiar with gimp/photoshop.
Also, while the avatar you linked is nice, I'd recommend that modeller's newer boy https://watarino.booth.pm/items/3216357
Having seen both in game this one looks a fair bit more high res
Another cute twink is https://hyuuganatu.booth.pm/items/3162696
But in the end go with what you like