How to interact with normal people?

In the past I have very difficult time interacting with normal people. So different worlds. Now, I think it is impossible. I don't know what to say, I don't want to say nothing when I am around people.

Thanks.

i'm not quite sure either anymore. this may sound odd, but i find observing regular people in groups can be helpful to see how the people react to certain situations. ( i find this helpful when i'm not sure what to do.) sorry if this was weird and unhelpful.
If all else fails you could make small talk?

Hi

Its been extremely difficult for me to interact with others, even close ones. i feel disinterested to talk about anything and it only irritates me when someone wants to interact with me. people can't understand what am going thru and so they may say something which can upset me, so i avoid them. not that they are intentional but why suffer when i can be safe in my own haven.