The fear of putting myself out there

Hey guys , did you ever loved to do something but were too afraid of other people opinion? That's one of the biggest problems of my life because it affects every aspect on it. I love singing and acting/ theatre since I was little, i discoverd those talents because our class used to do some little plays and because I always loved music. But a lot has changed since then, I was always an insecure and shy child but I also had more opportunities to do it. One time I had to sing for the whole school and all the parents on a school event that used to happen every year. I was the center of the attention, I had to practise infront of everyone, i never had any  music classes or anything and despite being nervous, i made it and i was good. But now every little thing is a big deal for me and all i do is living a life i don't want, i stop myself from doing things ive been wanting my whole life because of that insecurity and im more and more close to be one of those persons who live a life they hate. I hate to leave my house alone , i dont even know how to act, i cant join the theatre club of my school like i always wanted, i dont go to music classes, i want to work since im sixteen but i dont know how to talk to people , i want to go to the school therapist to talk about things i ignored and normalized all this years and a lot of other simple things because im afraid. And i know how this sounds btw, dramatic and stupid but, is something im dealing all this years and its draining me honestly. I wished my parents supported me more in this aswell but they dont really understand and i dont blame them for thinking this is no big deal. Anyways, Ive been wanting to write something in here for a long time aswell so i took the oportunity. Also, English is not my first language so ignore if someting's wrong. Thanks if you're reading this, i would love to read your thoughts on it aswell. :)