First, CONGRATS on that buck!
Second..........get that hide OFF from mid should, skinned up to the neck, without cutting into the hide if at all possible, b ut dont freak if you do, cuts are fixable.
Not sure when you shot it but it needs to come off ASAP for BEST mount.
DO NOT skin the head unless YOU KNOW HOW.
Get it all in a heavy plastic bag, get all the air out you can (vacuum sweeter works good, ......then put it in ANOTHER bag and do the same thing.
FREEZE it as is and look for a good taxidermist. I personally would call my instructor JOE MEDER in Solon Iowa if you want TOP GRADE work but he has LOTS to do. EXPECT to wait a year for a GOOD taxidermist to do it right.
Shoulder mount IS the way to go. If I hadnt moved and was set up Id do it for you.
Again. Hopefully its still ok but there are ways to set the hair if its been dead awhile. Skin it, freeze it........today.