I don't know if I would say I'm a narcissist, but I have realized that I'm very prone to interrupting people mid-conversation, because it's just what my family

I don't know if I would say I'm a narcissist, but I have realized that I'm very prone to interrupting people mid-conversation, because it's just what my family does. When I'm with them (or other interrupters), it's totally normal and not rude at all to interject when you have something to say and someone takes a breath, but obviously it's problematic elsewhere. Doubly so when I'm dealing with someone from the South or Midwest who tends to speak more slowly with pauses. I don't have any brilliant thoughts, I just focus very hard on not interrupting. If I'm on a call, I'll jot down the things I want to say, which helps, but in real life it's just constantly reminding myself that just because someone is taking a breath doesn't mean I should start going.