Skip the vote and someone else decides for you. Showing up is the cheapest power there is.

Decisions get made by whoever is in the room, and a decision made without you is still a decision you have to live with. Not voting does not keep you neutral, it just transfers your share to whoever did show up. Of all the kinds of influence available to a person, this is the cheapest one there is.

Find out what is actually being decided near you: the student council, the team captain, the rota, and when the elections for it are. Turn up and vote. Register the moment you are old enough rather than the week before you need it.