How Do I setup a (free?) Rust Legacy Server

Hi my computer is not the best in fact it’s the worst it can only Play Legacy but i don’t know how to setup a server on legacy can someone please help me and is it free Legacy is like 2 years old all i want to do is get a good education on rust before I start playing the New Rust plus my Computer can’t handle the new RUST?

this is the first thing google showed when i typed in “how to host a rust legacy server”.

next time, start with that.