The Tideline ferry isn't operating (and hasn't for a year...) but it looks like they're selling tickets (with a new schedule?) on their website starting July 1 for three routes: K-Dock to Pier 1 1/2, K-Dock to Pier 52, and Pier 1 1/2 to Pier 52.

https://tidelinetickets.com/berkeley-sf-commute/berkeley-sf-booking/