I (15M) can’t make ANY female friends, can anyone help me?

I don't know how to make female friends or even how to keep a conversation interesting with a girl. I do talk to girls in my class but it's just in class and most of the time it's just about school and homework. The reason why I wanna make female friends is I wanna like built a relationship with them and maybe after sometime being together with them in a romantic relationship. Can anyone help me?

(I'm sorry for my bad English it's not my first language)