You're actually in luck. Lower Merion HS has a robotics team, 1712 DAWGMA.
Get in touch with them ASAP and they'll help you get started or help you find a way to maybe join their team.
http://dawgma.lmtechclub.org/contact/
Or one of their other mentors on here:
http://www.chiefdelphi.com/forums/member.php?u=5183
The best help is when you get 1 on 1 attention, so please contact them first.