It is a matter of personal preference and whether you want to spend your money on make up. A lot of department store make up sections give you free lessons on how to apply make up. In my opinion skin care and wearing 30+ Sun block daily is more important.

sure .. bcz she is agirl .. and she should be beautiful all the time

I don't think it's important, but it sure is fun! Haha, at least for me. It can be a good way to express yourself, but I don't think it should be used to make yourself look like a different person. I like using bright colors because it makes me happy.^^ Haha. I think there are much more important things to spend time on: learning, making friends, exploring the world, etc., etc.^^

"It is by our adornments that we address our ugliness." - Kahlil Gibran

Why not? but there is nothing to learn actually!