You can train anyone to box, if that's what you want to do, but you can't put them into a competition unless you are an ABA Qualified Coach.
To start a club you need to buy bags, gloves, protectors, skipping ropes, pads. You need a venue where you can hang the bags up too and decent supports for the bags. You need a first-aider, showers, changing rooms. I'm sure there's lots more too. I think you would need some help.
Is there a reason why you don't just join a local club and help out there? They would be the best people to get you your coaching qualifications.
Good luck whatever you decide. Let us know how you get on.
