Good morning/afternoon/evening everyone!

I currently am living in a dorm room where each rooms ethernet speed is limited to 5 MB/s, each room also gets only one ethernet port. I currently have my PC connected to it but I also want to connect a TV and another PC. The provider is Spectrum if that matters.

My question is if I use an ethernet switch will that slow down the connection further? If so, any idea by how much? Also which splitter should I use if you all have any recommendations?

Thanks!