The Direct Entry MSN degrees are being phased out in some areas of the country, so it could be a bit difficult for you to find a program near you in comparison to the past.
These programs are years long, and each program is different (do they offer a BSN halfway through or not, when you sit for the NCLEX, are you required to work during it, etc.). From what I read in this post from 2009 (http://allnurses.com/nursing-educators-faculty/entry-into-practice-419939.html), it seemed like some schools better prepare you for clinical practice than others. I’m specifically talking about the one where students couldn’t sit for the NCLEX until after starting their MSN program because of a lack of clinical hours. My advice to you would be to do your research before applying, to avoid schools like that!
And remember, you can always transfer to a 4 year college in psych while applying for BSN/ADN programs and if that doesn’t work out apply for MSN. Personally I would try for BSN or ADN because they are more consistent with their preparations, but if you research enough there may still be some good MSN programs open. I know in my state (NC) they have all stopped admitting students around 2012, but I have no clue if that is true for California. By the time you graduate with a BA, there may not be as many programs still enrolling if they are experiencing a similar shift.