RTS Game

Hey everyone, I know I have a post similar to this on another forum, but I am making an RTS game where you control a squad of units, but I want to give each of the soldiers an inventory that the player can change, (for example the character has a sniper and a pistol and wants to change the weapons), also I want to use TGE not the RTS Starter Kit which I own but see to be a bit unstable. Can anyone point out and tutorials or resources that would help me add in a FURTHER DISTANCED 3RD PERSON CAMERA, AI SELECTION AND MOVING, and AI INVENTORY or any other tutorials that would help me in accomplishing the above features? Thanks ahead of time!