Well OP, since you're only 13 y/o, your parents are responsible for making any decisions about the horses.
As the other posters have stated, those horses need to be gelded and have some training put on them. Otherwise, you're going to get seriously hurt or dead, and those rank, untrained stallions will have only two options once that happens; kill buyer auction or euthing.
If your parents have even the slightest clue about horses, they should know that an ungelded male is not
an animal a child should be trying to train.