[1.12.2] how do i setup the enviornment

[LucyHonna]

hey i dont seem to find any tutorials thats new (2020) on forge 1.12.2 most of them are 2017 and they have a different version for example they say me to open "forgegradle" in the gradle menu but i dont find it i think that has to do with the version of the forge mdk, the version they are using isint supported by iIntelliJ IDEA so i was wondering if anyone could help me setup the enviornment or send some links for new tutorials on 1.12.2 modding , also im a bit famalier with java as i was doing minecraft plugins before this