You’re probably best off going to the eastern market metro, then taking the bus. It’s not a bad walk from Eastern market though. maybe 10-15 min.

For the bus, you can use the congress heights circulator, 90 or 92 bus. Get off by the O st gate at the navy yard, and walk under the 395 over pass. The stop to get on the bus is right in front of the Starbucks, just outside the metro.