I just got a Yorkie and I love him to death but his hair is just a big ball of fluff. I love puppy cuts and he's so tiny (about 4 months old) that he's still so close to the floor when he has to potty his tummy gets wet.

So I continuously wash his belly and face too because of his tears.
So I scheduled an appointment for next Wednesday for his first trip to the groomer. Is that too early? I was reading other posts and people said their first trip was at about 8 months?
Help?! I did already trim his tummy back some but he's just a hair growing machine. AND he hates to be brushed out. So I'm worried he might not even give the groomer the time of day to groom him out.
Advise??