I need to install TV and surround sound system

I need to install 5.1 surround sound system in the carpeted basement. I have amplifier and also the required cables but may need you to advise what else I may need before someone comes over to install it actually. Everything I have is 16-18 years old. I need to instal over the weekend of 27-28 Aug preferably. Thanks. I would say the area is 5 .5 meters X 6-7 meters. I don’t need to conceal wires inside the walls but externally instead as I plan to move in couple of years.