First:1. The title does not follow the rules.2. Neither does the description.
Okay, now to the problem.
You don't need coding skill to install mods on Mari0 (just to make them, which is already done if you downloaded it)
You need to install LÖVE
to run the ".love" files, after installing the right version(which depends on which mod you're downloading) you only have to click the .love file, and that's it.
About the "right version", most of the Mari0 1.6 mods use LÖVE 8.0, some of them use 9.0 (mostly the SE
mods and beta releases).
I hope this helps.
PS: Sometimes the mods will need you to delete the program files of the game ( %appdata%/LOVE/mari0 ), if you have problems finding them you only need to open the "Select mappack" option on the game and press "M".EDIT: ninja'd