i don't know what should i do, why can't i just stay the same?

i guess i'm a shy girl
and i mean really really shy.
for example, i get really nervous when i have to talk to people i don't know that well or when i have to speak in public
i just can't talk and can't be myself
but i think it's fine, that's me
lately, mum had found out that i'm too scare when i need to talk to people and she thinks i might have Autistic
i don't think i am and i want her to understand
but now she's forcing me to go to church with her and meet people my age and make friends
i know i can't just stay in my little square but i'm not ready yet
i want her to give me some time but she just don't understand
i'm scare ,i'm really scare
the reason i'm scared is because i don't know what will people think about me
they might think i'm a weirdo
also, it's going to be a christmas party so will they think that the reason i'm there is because i want presents?
i don't think i can change my mum's mind
but is there something i could do to keep me normal or maybe some tips?