Hello my fellow Americans abroad. If you have US citizenship, you have the right to vote, even if you've never lived in the US. If you have never registered before, get started here: https://www.votefromabroad.org/
If you have registered before, have you since moved house or changed circumstances? Get started sorting it out here: https://www.votefromabroad.org/
Depending on the US address associated with your registration, you may need to renew your registration annually. Get started here: https://www.votefromabroad.org/
Registering to vote and then casting that vote doesn't take much time, but can help make a positive impact. Voting for state and federal positions doesn't make you less of a radical, and it can be used in solidarity, especially with people who have been disenfranchised.
For more, see https://www.votefromabroad.org/