Soundness is always what I evaluate first. Make sure the calf has enough angle to the shoulder and the hock, making sure that all 4 feet point the right direction and the calf can fill its tracks. Watch for any rolling or movement in the top line when the calf is on the move; this is often a good indicator of some restriction in movement. I then would evaluate the overall thickness and feed-ability of the calf. Pick one that is wide based and pulled apart skeletally. Then, you can look for a balanced stylish calf that is straight topped, clean fronted and maybe has some hair and bone. Since it is your first year, I would focus mostly on a good disposition, structure and the calves ability to gain so that you can have a good first experience. Good luck and get the one you want!