How do I talk to people ONLINE?

I would consider me an outgoing person and I think I have a moderate sized group of friends/friendly acquaintances. However, most of these relationships are in-person only. I don't really talk with them through WhatsApp/Instagram or anything, and when I do I tend to get frustrated by their short/dry answers, and yet, when we hang out they seem so friendly and I have a lot more fun. When I try to talk to them through our phones I feel as if I'm forcing it, as if it weren't as spontaneous as I typically talk irl and it all just makes me very anxious about it. Is it something that happens to everyone or is it something I'm doing?