Need help in LOADING CUSTOM ROSTER

Hi guys i badly need help.

I just found out that no any tips/TUT across google on editing a custom roster and loading it as the MAIN ROSTER. I want to play my own custom roster on MYGM. Can anybody help and give me a step by step tutorial? Thank you for anyone who can help me

There's no in-game function to load a custom roster in MyGM. I believe it is possible using a trainer, but the in-game functionality was removed in NBA 2K18, owing to the fact that a story was implemented this year (same as what they've done with MyCAREER). Custom rosters can only be loaded in-game for Play Now games, or MyLEAGUE.