When I drew the original plan I just used what was in the book.

I didn't change any of the sizes when I modified the original to your plan.

We'd have to discuss your loads to do some actual beam sizing.

There are some standard loads that residential buildings must comply with but I don't know what they are for CA. You'll have to do the research and find them.
Then we could check to see if these size beams would work.
And it all depends on what type of wood you'll be using.

Jim Rogers