It doesn't matter what your age is. What matters is what you do and how you do it.

Not being able to drive needn't stop you. You might be able to get a ride from someone else (family, friends) or take public transport. Not to mention the possibility of learning to drive.

As for income, you don't need it to organize a user's group. And if you did need it, you could try to get a job to earn some. Participating in and organizing users' groups is a good way to make contacts which might lead to job opportunities, by the way.