Home plugs should work for you. There are two standards for home plugs so just be aware which ones you buy initially in case you want to expand the network later.
Initially I would plug the in on opposite sides of the same room, follow the setup instructions and ensure there is a connection.
They are easy enough to set up - ethernet cable from router to homeplug 1.
Ethernet cable from homeplug 2 to PC / laptop.
Once you have established a connection move from room to room and experiment.
Always plug the Homeplugs into a wall skt, avoid extension leads.