<human>: Provide a brief overview of the text.

I'm still studying at school, and this is my final year. Recently I discovered that I have a crush on a girl from another group. Every time I see her my behaviour becomes a bit more unnatural than it should be. But I guess there is something I can do about it.

There are two main reasons why I feel clumsy in attempting to approach her (though I haven't even tried yet):

1) She's been studying in our school for more than five years, and I've never talked to her (even noticed her).
2) My self esteem went down after getting rejected a few months ago.

So now I'm desperately looking for advice. What should my first steps be considering all the points mentioned above? How to approach her and get to know her?
<bot>: What shall my (17 M) first steps be in approaching her (18 F) if we've never ever talked before and I have no idea how to start the conversation in such scenario?