Why am I awkward no matter how much I talk to people and how can I fix it?

I have a job that requures a lot of walking. When I walk past initially I say hi. If I do again I don't know what to say or where to look, I just look awkward, visibly anxious.. I also dk how to enter group convos. I can talk one on one and act normal but everything else I'm lost.
Why am I awkward no matter how much I talk to people and how can I fix it?
Post Opinion