>>377927864
here are some more tips
AVOID trying to look like a mascot character, the closer to human you are the better
don't go crazy on the colours, natural ones (grey, brown, black, white, etc) are a good choice, keep your pallette restrictive 
digitrade legs are off the table, just don't
no fur shaders
add some fur tufts around the body, choose fluffier ears for your boothcat, mofu is good!
don't make a long snout, keep it as short as possible (a lot boothcats already sort of have one, anime style 3d modeling is wild)
if you manage to follow these guidelines you may not get instantly votekicked out of a meetup (the instance owner may think otherwise and just instantly kick you, but hey don't take it too personally and try again) 
I eagerly await to see if you actually manage to pull it off, do your best!