You CAN make a difference if you get involved on a local level and get active in your community.
And this is the VERY key part. Local organizing almost always makes larger impacts, because most people, to be perfectly honest, don't give a shit about any form of organizing in their local community. It's easier to cast a ballot for a federal candidate, "chip in" (as all political fundraising emails love to overuse so fucking much while setting the default for every donation to like $50 or some bullshit after asking 20 times a week) a few bucks, and be done with it, than it is to walk down to every house over a few block radius and have a chat with any person who answers the door about a local candidate or policy.
To use Zohran as an example, he's already gotten hundreds of thousands of votes, but as of one of his campaign's emails yesterday, got just 1,000 people to canvass today (a day they were trying to break the record for most doors knocked in a single day, which is meant to attract a large swath of anyone who wants to canvass for him).
One person in a thousand canvassing for him is infinitely more impactful to the end result than one person voting by ballot.
"... but now I've invented a revolutionary way of keeping these things top of mind, always available, and crucially, found. It's called 'remembering', and you can do it too if you try. Just follow these simple steps, and also buy my overpriced book made to sell you the same information but in a format that makes me sound more intelligent and pretentious than I already sound. Thank you for coming to my TED talk"