I've been making connections with CPATH, which is a nonprofit focused on helping kids with CP in central Texas. Everything's volunteer, but I've been coordinating volunteer events with my school & OT students to help out with CPATH's events. You will probably be hard-pressed to find a paid position that offers leadership unless you get some kind of managerial position. Depending on where you live, & if you have any interest in mental health, you could look for a Clubhouse to help out with organizing activities. Their goal is to make their members self-sufficient within the organization, but there may be opportunities with them.