I want to create a private server and then make it public

[fhmagno]

Hi, I haven't played ragnarok for a long time, but I want to create a private server and then make it public and between people. 
The question is: what do I need to open a private server on my own PC and be able to modify it? I need to know what I should download (even that ragnarok download) please I need help.
 Now I study programming and understand code but I don't remember what to download.

[saitamaq15]

Good Day`. .there are so many guide on Forums....

[Emistry]

https://github.com/rathena/rathena/wiki/installations