The solution isn't to get involved in politics, it's to put an end to this "if you haven't died by the age of 18, you get to cast a vote". At least a four year requirement of a four year STEM degree at an accredited university should prevent people who aren't used to dealing with facts from getting us all killed.
Democracy is a great idea so long as you limit whom you consider "the people".
Given the number of people employed in our industry without a university degree — many of whom are leaders in their subject matter area — i think your proposal is not just obviously discriminatory, but spitting into the wind of a gale of contrary evidence.
Get out, see the world, go talk to people in places and industries where a university education isn't paramount, and then tell me again that they should be denied a right to vote.
Democracy is a great idea so long as you limit whom you consider "the people".