@TrangHo
Is there anyone who can help you do this who can teach you?
It’s not that you can’t learn it all yourself, but to do a FOH/MON split (if that is what you are describing) I would expect substantial prior experience and help with a specific problem.
If not, can you describe IN DETAIL what you wish to do and what you lack.
Don’t take this the wrong way, but to gauge how to answer you we need to know what your experience level is. Have you read the manual, have you watched the youtube videos, do you have prior mixing experience, etc.?