As far a diet, you should avoid all fatty foods, don't eat red meats (steaks, burgers), chicken breasts are best to eat for meat and so is fish, increase your vegetables and fruits a lot, don't eat junk food, no processed foods (hotdogs, bologna, prepackaged meats, canned meats -- no no's), do eat oatmeal every day
(it does help).
The Hep vaccine would have nothing to do with your ALT now.
The liver is a remarkable organ and can repair itself - remarkably so.
Best of luck.