Hi there,
As a US citizen living abroad, you have three options...
1. Vote in your state/local party primary in the Spring/Summer 2020.
Some states require that you register/declare a party affiliation before an election, and some have deadlines for this registration. Usually...
You can vote in person at many voting locations, or by email with Democrats Abroad in Spring 2020. Make sure you are signed up to receive emails since the announcements of voting locations and participation...
3. Vote in both State/local and Global primary. If you select this option, you may vote in the Democrats Abroad Global Presidential Primary, and vote in your state/local primary, but only for down ballot races other than President.
Let me know if you have any other questions.
Best,
Jeffrey