I have some questions/requests.

Today is the first day I've used this wonderful app and I ask if maybe some pros and people who really know what they're doing give me some tips and tutorials on how to do some cool things with this. I will be watching some tutorials on YouTube and I have figured out some stuff on my own and am working on a mod, but I just ask if I can get this help please? 

(Specifics that I will probably look up but help would be appreciated is how to add and replace game music and creature sounds)