Hi I really want to become a famous author when I am older, though I do not know how, plus, what if people do not like my ideas.

Yours,
Smiles.

Start writing a lot of stuff, and the public will decide how well they like you, or your ideas. No way to tell if you don't put them out there, right?

Not everybody has to like your ideas, just enough to make you rich, AND famous.

Agreed, a good author writes from the heart, what they like, and what they believe in.
Then sometimes they find a great audience. Some authors may not even be highly respected to long after their death. Others become famous only because someone makes a movie out of their books.

I'm pretty sure you are doomed before you begin.
You want to be famous. That's IT?
Any author, painter, musician, creator of any kind, has to be driven to do their craft, not thinking about fame, because almost EVERYONE struggles for years against all sorts of obstacles, but they keep going because it's what they must do, whether they starve or not.
Doesn't sound like you, does it?

[I never coddle a wannabe.]