You are of-topic -But LMMS need coders :p
But.. Coding LMMS is university-graduate level!
LMMS is made in C++
That is a tuff language to learn. Further more LMMS depends on Qt, a layer over C++
Even more difficult
But..
Code is FUN, and you can have a lot of fun with coding, also on levels way below LMMS-needs :)
If i should point you to a language that has some bearings to C++, but is way simpler, it would be C# or JAVA
Good resources
C# : https://stackify.com/learn-c-sharp-tutorials/
JAVA : https://javarevisited.blogspot.com/2018 ... nline.html
C++ http://www.bloodshed.net/dev/doc/index.html