You can delegate your concern to a political party, which is essentially all you are able to do as a citizen in a country like the US particularly if you live in a state that does not have a lot of referenda.

If you want to learn more you can spend more time on researching the issues. Otherwise you could vote on a single issue, or just pick the party that is supposed to represent people like you with a similar hierarchy of values.

The US also doesn't have mandatory voting, so declining to vote just signals that you have delegated concern over civic issues to other people who are willing to make that (sometimes significant) sacrifice of time, energy, and money.