Goblin boy is 17 months, and already, he's such a BOY. Given free choice of all the toys here, at his childminders (both of them), at every play group we go to, he always wants the same thing: the tractor. If he can't get one, he wants a fire engine, or a truck. We've never pushed him to anything.
Having just started to learn to walk he wants to stand in every puddle, tramp in the mud, everything. None of his female friends do this.
He'll be who he is, and nothing we do (invite him to like horses and computers, because that's what we do) will change who he's going to end up being. If he wants to be a ballet dancer, then that's fine too. Hopefully he'll teach me everything he knows about ballet.
Don't overthink your little person. Just let him be a person.