First time ever playing the game, just finished the main story. Ouch.

My heart hurts, it was bad enough when lodgock died but it hurt me when Professor Fig died. I've never wanted to hit a fictional character as much as I did Black during his speech. That's all but it just hurts. If you have any tips for post game stuff please do tell, I always seem to get disinterested in games after the main story so anything is welcome. (Also to note I read all the books and it was recently on a very good sale, I went in blind only looking up things related to the keys and moons nothing else)