Hello, so I just bought a Sony STR-DH790 and Klipsch Black Reference Theater Pack 5.1 Surround Sound System. Im completely new to receivers, I have only ever bought sound bars. My question is do I connect my 4k player,ps5 and amazon fire stick directly to the back of the sony receiver and then connect an hdmi cable from the receiver to an hdmi slot in my tv? And does anyone have any recommendations on what extra speakers I should buy in order to get 7.1 sound, hopefully in the $300-$400 range? Thank you.