Well done in thinking of the idea,
I hope you get on ok.
You will need some sort of Train the trainer course. ( only a few days)
NUIGalway ( open learning centre) do one in various locations in Ireland
Manooth university?college also run one.
They are just basic courses, but you need to have one.
You could also look at the fas website and register to be on the Register of trainers.
This means that once you are up and running fas may give a grant to your courses. It also gives you more crediblity.