Internal Cabling

Hi all. I need to pass a cable from living room in the first floor to the bedroom in the second, as well connect this bedroom to another one with an ethernet cable (ok, please, I do know about wi-fi and other ways to connect) but I'm required to have an ethernet cabled connections between all the home network and the modem.

Problem is that I'm terrible in doing this type of things and I would like to know if anyone has a good refer of a cable technician used to do this type of service and accepts such a small service.

House is typical American construction with two floors, drywall and a tall attic, nothing fancy.

Thank you for any referrals and have a great weekend.