Chosker would be good 
Code can be irritating but there isn’t a quick fix unless you ask specific questions, but yours are too general.
First glance you’ve got 3 problems: sound, attach weapon and AI movement, and I’m guessing that’s only the start.
There are many posts on the Forum that’ll get you up to speed on AI not moving (couple of links below). Even attachweapons and sound. It’s all been asked before. But to repeat: your question is too general -for me to answer- imo, you need someone to write the whole thing for you, or employ someone to do it for you.
Search the forums for posts by Tegleg GeoDav TheAgent to name a few.