That's a beautiful buck and with a bow, it makes it even better. As your first one, it probably makes it the best one you'll ever shoot, regardless of size.
I'll never forget my first whitetail buck with a bow. He wasn't very big but I worked my azz off to harvest one with a bow and took him at 8 yards, from the ground, right through the heart. I didn't know I'd hit him in the heart until I was cleaning him and saw teh red 'X' from the Muzzy. I felt about 10 feet tall....
Congrats!!