Congratulations Kalina! It is amazing how active you are!
We will be announcing the program on 8th March, if you are subscribed you will receive all the information. You, as WiF member will have the opportunity to get a mentor.
I’m not aware of any school for high school students or any internships. Studying plasma physics or fusion engineering needs quite a background knowledge, which most of the high school students are missing, but I’m sure one can make an exemption if you have the knowledge. I suggest to discuss this topic with your mentor.