RE: First Deer Ever!!!
Congrats!
You may already know this, but while a liver hit is fatal it is not a desired aiming point unless dictated by the shot angle, such as a quartering away shot. The arrow will often hit the liver before going through the diaphramand into the heart/lung area.
Deer hit only in the liver can be tricky to recover, especially if pushed too soon.
I'm glad it worked out for you.