Have you been to other conferences before? In case not, I can tell you that you are not required to talk to that much people if you don't feel like it. Just keep to yourself and you should be fine.

It would however defeat the purpose of making the effort to go to said conference. I'm simply stating this as a fallback mechanism in case you feel too shy or anxious when you do get there.

So try not to think much about it. Worst case scenario you will listen to great talks, learn a bit, and go home without talking to anyone.