English and Spanish versions of site (Multilingual)

Question:
Hello! I want to have an English and Spanish version of my site. Eventually, I would love it to be truly multilingual, but just English and Spanish to start is fine. I would like to create the Spanish version myself, as I know Spanish, so it will be more effective and less costly than using Wix Multilingual to automatically translate.

I’m wondering how to do this and create the appropriate page structure. I would need
domain.com/about and domain.com/sp/about
domain.com/home and domain.com/sp/home
domain.com/memberpage and domain.com/sp/memberpage

and so on…

How is this possible? It must be possible, I think!

Product:

Wix Editior