Go to Action Star Games on Sunday(s) and talk to teams there. There are several division 5 teams that are always looking for new players. If you can show that you can play at a higher level, then the upper level teams may ask you to come play with them.
Be aware that playing on a team requires the proper equipment, time dedication, and a whole lot of money. Since you are under 18, many teams will need to speak to your parents/guardians before having you play events with them.
Evolution Sports Zombie Unicorn Attack