Do you have a place to practice organ playing? If not, how about going to the local church nearby and asking for it?
I know, sometimes pastors or priests might not appear friendly to strangers so you have to earn their trust first.
One of the best ways to earn trust is to help people.
And one of the best ways to help a pastor or a priest is to offer volunteering for their church services in exchange for some practice time.
Maybe not every church in your area is short of organists but if you look around, you might just find one which could use your skills.
This way, not only you will get a chance for practice but also built-in public performance opportunities.
Just think about it, how many pianists have to figure out a venue, an occasion and get permission to play even a few pieces for people but any church organist can do this any time.
Who knows, maybe they will like your volunteering so much that they will offer you some part-time organist position?
For starters, you just need to ask.