Help! Need information!!?

[Yoli]

Alright, so you probably read the title and thought "thanks for giving lots of detail." Well, this is what i mean: I want to be an author when i grow up, but i don't want to publish books now ( i am only 14) and i know people do publish books at my age or younger, but i don't won't to yet until i think i am actually capable of write my best book and completing it. (i always get to the fourth chapter and get bored) so my actual question:
Are there writing websites where i can sort of publish them on there, people can read them and like it or dislike, comment, give it a number of stars, things like that. I don't want to put it on facebook, or twitter or any of those types of things. An actual writing/ blog type of website that is free.