Hello Chris, Welcome to the form, as Bob above said you'll get all the help you want or need here so don't be bashful about asking, ok?
Where about are you located in Calif? I'm in the foothills North of Fresno as if heading up to Yosemite.
As far as DC & DCC there is two sides to both. Being an old timer I've always been involved with DC and see no need to change as I can't see how it would benefit me and I did give it considerable thought a while back. The way I view it is this, I'm only going to be operating one train at a time picking-up cars or delivering them and I'm fine with using the block system so DCC offers No advantage for me and costs a lot more.
Others have different opinions I know but it all boils down to what is going to work best for you?? I also thought the having sound, the Chuff, Bell & Whistle at start up or when slowing down was something I'd really enjoy but after helping a friend build his layout and he has a couple of DCC Loco's that also run on DC and produce the Sounds as mentioned above it does get tiring to hear it all the time and others on the forum have said the same thing. Well anyway that's my input on the subject.