How do I know if I have a yeast infection ?

I know this is probably a dumb question , but I’m really young and I’ve never had one . And I want to know what to look for if I ever do ?

Is it painful does it itch or smell ?

I’ve heard some people’s skin peel is that true ? Like they get dry skin or tears near their vagina ?

I’m sorry if this is stupid I’m 14 and I literally dont know anything and I’m too embarrassed to ask an adult