FOSS gamedev and creative worlds

Hello,
I want to play online on my own world with mods, but it don't know if it's legit.
Please help me.
Put this thread into the server place, if you are a moderator please.

Sure, you can host a Minetest server on your machine anytime you want. All mods are server-sided, this means your clients will not need to download anything manually.

Here are some good server creation guides in the servers sub-forum:
[Guide] Create and maintain a server on Windows and the older Illustrated Server Creation Guide

I think you miss understood me. I wanted to know if I am allowed to use mods on my online world.

Of course you can. Minetest has a very friendly mod ecosystem - there are no mods which enforce silly demands like singleplayer only in their licenses