I think someone else mentioned it, but BART doesn't go to Redwood City. Caltrain does. As a daily BART rider from the East Bay, occasionally needing to be in Palo Alto, I don't recommend combining a BART and Caltrain commute.

If you want to live in SF, and commute to Redwood City, your best bet is to ride the 8:44 or 8:59 baby bullets on Caltrain. The one at 8:59 gets you in Redwood City in a scant 30 minutes.

Pick a place in the city that is near the Caltrain station, maybe even within walking distance. Dogpatch/SOMA/Potrero? Keep in mind Muni timing sucks, BART is semi-stable, and Caltrain is the most reliable.

Also that's a reverse commute, so maybe even drive it.