Yes, it’s possible to talk about religion too much. And jazz too much also, and any subject too much.
Part of being a good conversationalist is to talk about things of interest to the group you are with. If you’re posting on CAF, you can talk about religion all day because everyone here is interested. Similarly, if you’re posting in a jazz fan forum, you can discuss that all day. But if you’re talking to a group of people with a passing interest or no interest in religion or jazz, you might mention those subjects from time to time but you would want to mainly talk about some mutual interest you share with the other person. If you do not have any mutual interests, talk about the weather or something neutral (and find friends to talk to who share your interests).
Religion, like politics, is not a neutral topic and many people don’t want to hear about either subject because they get too wound up.
It’s normal to be excited about becoming a Catholic and want to talk about it a lot, but your family isn’t going to be that interested and as someone else said that’s not how you win souls to Christ or to Catholicism. So tone it down a notch.