How do I STOP 🛑 being so awkward in social interactions?

How do I STOP ๐Ÿ›‘ being so awkward in social interactions?
I'm soooo bad at holding a conversation or just act like a normal person. Earlier today I was at an art store, and the woman who worked there dropped a bunch of books. I helped her pick up the books and she started a conversation, (I don't even remember what it was about) and I was awkwardly laughing the whole time. ๐Ÿ˜” Then when I finished helping her she said "thank you a thousand times", and stupid me responded with "yes". BRO I feel so embarrassed looking back. Why didn't I just say "you're welcome" or something like that. I also had this facial expression the whole time while she was talking to me: ๐Ÿ˜๐Ÿค Kind of, ehh.. I can't find the perfect emoji, maybe more like :T

Well awkward social interactions happens to me on a daily basis. If someone walks past me and smiles at me, I don't give a smile back. No, I literally give this awkward face ":I" or I look down, I look to the side or I just freak out.
AND LET ME TELL YOU, (this one is the worst) whenever, and I mean WHENEVER someone talks to me, I don't know what to say. They talk about something, and when they pause it's just this awkward silence. I don't know what to ask, what to say, what to do, and I just end up stuttering or awkwardly laughing. And whenever I try to say something, I just stutter, I get pronunciation problems or I just can't find the words to use to express what I'm thinking about. UGH I'm so annoyed at myself and I want to fix this problem. I don't want to be awkward. ๐Ÿ˜ญ

Please if you have a solution, tell me! I need it as fast as possible. ๐Ÿ˜ข๐Ÿ˜ข
How do I STOP 🛑 being so awkward in social interactions?
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