Affiliate Marketing Secrets

My high school is in a first-rung suburb of Minneapolis, and is very poor. Budget cuts every year. The fact we’re surrounded by much richer schools doesn’t help our rep. But me and a few friends love the game of rugby, but the high school can’t sanction it for obvious reasons. Hell they might even drop a sport or two! My friend said that we can start a U-19 team that doesnt have to be affiliated with our school, but affiliated with the MN rugby…thingy.
Do any of you have tips on how we should go about publicizing the club concept, getting players, coaches etc? Thank you!