I’ve been a professional programmer pretty much since I moved to Footville and for almost all my programming questions, I go to stackoverflow.com. There’s tons of experts from all over the world who are more than happy to freely answer any question you have about compilers, algorithms and any esoteric thing you can think of in the world of programming.
A few years after making that site, the guys who started it let other people come up with ideas for sites based on their own interests, if they could get enough people together to support it and maintain it. So now they’ve got a network of Cooking and Outdoorsy and Gardening sites and over 150 others. But the one I participate the most on is the Christianity site (I tried unsuccessfully a few times to muster together enough support to start a Catholicism site, but oh well).
I’ve been asking and answering questions there since the site went live and have learned a ton through the process. Even today, I got called out as a heretic.
If you want to look for questions about the Church, put [Catholicism] in the search bar. Other good things to search for are [Jesus], [Virgin-Mary] and [Swedenborg]… On second thought, forget that last one.
I should point out though, if you’re going to ask questions on the site, it can be a little tricky. Try and search for a similar question first, some times you’ll find it by trying to ask the question you want and then someone else will come by and tell you that it’s already been asked, they’ll probably close your question, but that’s OK. If you think it’s substantially different, just edit your own question to explain why.