Lost!!!

I need some advice! Okay so I like this guy. He is a friend of my sisters boyfriend. My sisters man told me he likes me. I like him too but I’m not sure. He is younger then me which I was unsure of. We talk but he doesn’t make any moves though so it makes me think he’s not into it. So should I make the first move? What y’all think I should do? I haven’t dated in years after a long relationship so I’m lost here.