My heritage is Christian. My grandfather was a preacher. He had 10 kids and they were all (save one) devout Christians. The real kind, not just for show. We went to church every Sunday. Along with the formal services, we had Sunday School where everyone broke up into different age groups. Here we were taught lessons aimed at our period of development.
Don't lie; be nice to people; work hard; help the less fortunate, etc... And in my experience, it was done with love. All my Sunday School teachers were the nicest people in the world. I know I was a bit to deal with and could have just been written off as a smart ass, but they found my strengths and actively encouraged me to use them in positive ways. They helped me fit in more than anyone I can think of besides my mother - who was, on occasion, my Sunday School teacher.
The classes are usually entertaining and interactive. We had craft activities where we produced something fun, games where we could release any pent up energy, and a story/singing time where we learned these wonderful lessons on HOW TO BE. The entire time is fraught with guided social interaction. There are no bullies because the teacher/student ratio is like one to four or five and every moment is occupied.
Of course, this is my rose-colored memory. I know humans are the ones running the classes and kids can be mean. I know we all can have bad or off days- or be evil. I also know I was lucky to have gone to an exceptional church and my own family heritage just laid the foundation for everything else. I believe it's why I've been able to pass as an NT all this time.
I'm very mindful of the richness of my life - because I went to church and Sunday School. I've met some incredible people, worked alongside them. I was inspired to do great and wonderful things that now, sad to say, I don't think I would have done given what I'm seeing on this site.
My point is that churches have been doing ADA training for a long time and it doesn't cost anything to attend, though they do operate on donations so you could leave a tip - but you don't have to. Even adults have Sunday School classes. I once took a SS class about friendship that was very enlightening. Another class was about self-motivation. It's all good stuff and fairly non-confrontational. It helps if you know someone there before you go, even if you just meet with the pastor or an elder privately before attending.
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Life isn't about waiting for the storm to pass; it's about learning to dance in the rain.