If you can’t get a ride, there is currently one bike spot left on Amtrak leaving Tuesday (Coast Starlight that you can take to San Jose and take Caltrain or to Oakland and take BART). Or if you have a bike box (or buy one at the Amtrak station) you can also take it on there for $10.
You can also take a train to SLO and connecting bus to San Jose (no bike reservations required but you have to take a chance with the bus and you’d be keeping the bike stored unsecured with other luggage.