How to communcaite in a group

A little context: I’m 19M and currently in university. I’d say I’m pretty confident, I’m part of a few societies and good with 1-on-1 conversations. For example, during an interview for a society, one of the girls on the panel literally told me I gave one of the best interviews she had seen and that I’d do well in companies.

So, I know I can hold my own in individual conversations, whether it’s with a guy or a girl.

The issue is when it comes to groups, especially if I don’t know anyone there. I kind of freeze up. I don’t know whether I should go around introducing myself to each person, or what to even say to start engaging in the group.

For those of you who have cracked the code of group conversations, what advice would you give? Communication is something I take seriously, so I’d really appreciate any practical tips.