Introvert trying to fit into society

So I’m struggling to talk to people because I want to talk to people I just don’t know how to start the conversation or continue the conversation. It’s always so awkward for me to talk to people. Because when I start the conversation I feel like I have to finish the conversation or continue the conversation and when is it good to finish a conversation?

I’m just really struggling with this and I need to look at my social skills. How do I get friends? Will I ever get a girlfriend? I’m not worried about charisma but how will I actually talk to people? I can have a normal conversation. It’s just it just eventually gets dumb and I don’t feel like I want to continue the conversation.