Of course it depends on how much pre transition my other self would be. If its early enough, I would say
* yes you really are a girl even though you look like a boy
* dont let others tell you otherwise, there are others like you
* People exist who have changed their body to be a girl, you can do it too
* your sexuality then will be nothing to hate anymore
* you will feel good about you and right, you will discover that you really always have been a girl and not a boy who wants to be a girl.
* Dont let them tell you that you have to already know you are a girl, how would you do that if you have not lived as a girl, its ok that for now you feel like you rather want to become a girl. Once you live as a girl, you will discover that this was always how its meant to be
* Get those hormones really soon, every month counts
If I would be talking to my just pre-transition self, I would say similar things but also maybe add some more practical tips.
* take super care you dont gain weight, its way too easy to gain weight as a woman
* dont let it slack on the laser treatments, get it done in 2 years and then do electro, the sooner this is done the better
* Dont be afraid of the voice therapist and stay with her after the first hour, your voice needs a lot of work and doing it just by yourself is not the best option. Its going to be the most crucial thing. People will tell you surgery of the voice does not work, but dont be too afraid, just wait a few years.
* Consider not choosing Dr XXXX for SRS, he is good but has his bad days.
* Go out more as long as you are young and dont shy back from entering relationships even though you may not know yet if you like boys or girls.
* And yes, you are going to pass
* Oh and your mom will come around in time, your dad will take a while longer but even he will come around and accept you as his daughter. He likes you to do the education or carrer thing though, but thats not a problem for you, you are a smart girl and can make your dad proud of his daughter. Oh and your sister is going to marry and have a kid, so no sweat about ending the family heritage by doing SRS.

- thats fun.