FOSS gamedev and creative worlds

I would like to learn how to make mods but I don't know how to code them. Are there any modding tutorials?

the best place to start is to fetch some of the simpler mods off these forums, consult the modding API...

https://github.com/celeron55/minetest/blob/master/doc/lua_api.txt

...and look up tutorials on learning the LUA language.

hmm...U could always try jeija's tutorial...its outdated tho... :|