Help??

Hiya everyone! I’ve seen a lot of things about people coming out and TBH I am kind of scared to do it. Only my close friends know my personality and I do have quite a few friends. The only people I know that are 1000% against LGBTQ+ are these popular girls who think there everything. I want to tell my parents and I used to write them letters and put them Underneath there bedroom door cos I was too scared to tell them something 😭🙈 So I’m procrastinating and I’m thinking about doing it again? My mums best friend is lesbian but idk how she feels about Bi-sexuals. I have a sister and a brother too and they have lesbian/gay Freinds. My sister said she wouldn’t judge me but I’m scared to tell everyone?!? Should I tell my school?!? Help?