What is my next step?

I have a 2012 65" Panasonic plasma TV located in a bedroom that I need a sound system for. I watch the TV from the bed which is up against the opposing wall. I think I want a stereo system with maybe a center channel and sub. The placement of the speakers will be on either side of the TV. I am currently listening to the tiny speakers built into the TV. I need some suggestions and guidance on what I need as I have no experience with Home theater systems. I appreciate the help.