I often hear people say they don't vote because they don't know who to vote for. Don't be afraid of voting straight-ticket. People talk about it like it's a brain-dead way to vote, but that's completely wrong - it's sensible! Political parties are more ideologically aligned than ever.
So if you want government to do more on helping the working class, fixing roads & bridges, and climate action, vote Democratic. If you want lower taxes, fewer rules for businesses & more rules for who you're allowed to marry, vote Republican. If you think both parties are irredeemably broken, vote for all the 3rd party candidates you can.