Can someone help with my social skills?

I know this has probably been asked a billion times, but I need some help.

I am relatively social online, but I am not really at all in real life, I am probably the most unsocial person at my entire college.

The things is, there is a lot of people who share the same interests as me at college (Marvel, Arcane, Squid game etc) but I just lack the courage to talk to them.

I just don’t know how to start/hold a conversation, I did before Covid, but ever since then, I just have never interacted properly with anyone because I struggle.

Can someone help me out please?