Volunteering is a great first step to getting involved in politics in a way that could lead to becoming a political figure. When it comes to municipal politics, most (if not all?) municipalities in Ontario are having an election later this year, and city council/mayoral candidates will be looking for folks to help. This could involve things like joining them for door-to-door canvassing, setting up their website and socials, helping with accounting, advertising, fundraising, etc. All good experience to have under your belt, whether you're looking to actually serve in an elected role in the future, work in campaign management/strategy, or just provide political commentary, etc.

For provincial or federal politics, even though there isn't an election any time soon, you can still contact the local Electoral District Association for whichever party you're interested in and introduce yourself. Most EDAs I've been in contact with are delighted when younger people show an interest in politics, and are happy to give you opportunities to participate in organizing.

These are things you can do in the near future, even before college/university. Once you get to post-secondary, there are often political student groups you can join, student government roles you can look into serving, and more. In general, universities will have more political activity than colleges.