RI voter reg info here. Your local board of canvassers is likely running regular hours on Saturday. If you’re not a Vo Dilundah, find the national voter reg form and info here. Check out BotherVoting.org for more nonpartisan ways to shame and harass your friends into participating in our failed democracy.
If you’re from some other democratic country, learn your lesson from us dumbasses and participate there! And if you’re not, well, there’s always a coup.