Want to have long conversations with people🥲

Im 16m. I’ve been quiet since my childhood. But after lockdown, I want to talk to people but the problem is I don’t know what to talk about or how to talk. Not only with girls, I wanna talk to everyone, literally everyone. It happens with aged people or people my age and even when I’m with my friends. I feel so boring and embarrassed when I’m with only one friend because idk what to talk about. Any tips for me?