The MCP tutorial is old and dont work anymore
now u need and eclipse with gradle, well intelij with gradle would work too but i never worked with that.
i made a tutorial how u can get and build my mod, its basicly the same for every other mod
if u want to try it with the example mod from liteloader take the git url from instead of my http://develop.liteloader.com/liteloader/ExampleMod
if something isnt working tell me, i look into this thread daily