One of the previous posts hit on the subject of choosing a group where you know the people that are there.
That brings up my pet subject that Bible study groups should be friendly and open. I’ve been in a couple awkward groups, and it’s almost painful to be there. So, the social aspect should not be neglected.
But, part of the social aspect is being accepted. So, if you put yourself in a non-Catholic group to begin with, you should know whether you are welcome or not, and if you can speak freely or not.
I attended a friendly study group at a Christian Reformed Church for four years, but then I got “jumped” by a new member from that church who was very opinionated about having a Catholic in the group. Of course, I got jumped on the first time in 4 years that I asked a mildly pointed question about their church practice. From that moment on, I did not feel welcome.
Other Catholics had come and gone very quickly, too, when they apparently felt uncomfortable about being there. Funny thing was, half of the group was Catholic, to begin with.
There was a CRC lady there who had grown up with some stress between herself and her mom, who was a “good Catholic.”. Eventually the daughter left the Roman Catholic Church and joined the Christian Reformed Church. As she put it so well, “I was a Catholic for 24 years then I became a Christian.”
If you like a group with that kind of sarcasm in it, or if you can put up with that sort of thing, then join whatever group you want. But it may be tough to sit there in silence. And, it may hurt at times.