How do I make closer friends?

I'm not someone who struggles to talk to people exactly but I've never been great at turning conversations into actual friendships. I have people I'm cool with at school, guys I'll talk to in class or joke around with at lunch, but none of it ever seems to go anywhere deeper than that. Everyone else seems to have their people and I'm kind of just floating around the edges of different groups without really belonging to any of them. I've been like this for a while and I kept thinking it would just sort itself out but it hasn't. I don't know if it's because I'm naturally more quiet or because I just don't know how to actually take things to the next level with people. I started thinking about what was actually stopping things from going deeper. I was never the one to initiate anything beyond school. Never the one to suggest hanging out, never the one to text first, never the one to share anything real about myself. I kept waiting for friendships to just happen naturally without putting anything in. I also thought about whether I actually wanted close friends or whether part of me was comfortable keeping things surface level because it felt safer. I realized that being introverted wasn't the problem. Waiting for other people to do all the initiating was. Nobody was going to pull me into a closer friendship if I never gave them anything to work with. The guys I got along with at school were already there. I just hadn't done anything with it. Talking it through helped me see that I didn't need to overhaul my personality or suddenly become someone who's great at socializing. We agreed the best next step was to pick one person I already got along with and actually initiate something outside of school. Nothing big, just something low stakes like asking if they wanted to play something online or grab food. One person, one small step. That felt like something I could actually do without it feeling like a performance.