Sausage is..
Black Pepper,
Salt
Sage
optional Red Pepper.
Try a small amount first. Say half pound
measure the seasonings... and write them down... start light...
mix small amounts... cook a small portion taste. what does it need?
My father made sausage... but he only used his sense of smell. He never wrote anything down. I just remember the ingredients... and he made like 50lbs of the stuff at a time.
Good luck.
PS: I found this photo tutorial it might help a bit... but it shows link sausage stuffing as well.
http://www.sausagemania.com/tutorial.html