I would start out investing close to home, or move, or both. Personally, I have successfully invested in buy-n-old SFRs both locally (Palmdale, CA) and out of State (Phoenix, AZ) ... cash flow out of state seems much better, but better be darn sure you have 1)a good real estate agent, 2)good contractors, & 3)a good prop manager (most important) because you will be highly dependent on them as your experienced eyes & ears on the ground. Problem is there are a lot of thieves and incompetents, and when you are 1st starting out you won't likely know enough to be able to pick out these 3 and get them all right, and may suffer as result (believe me, I know from painful experience).
I started by moving from Glendale, CA (nice neighborhood, but horrible for cash flow investing) to Palmdale, CA (not so nice, long commute, but cheap and much better cash flow). Yeah it sucked, but it allowed me to: 1)save a ton of money, 2)buy a SFR for what the down payment in Glendale would've been, 3)familiarize myself with neighborhoods enough to know which ones to avoid, 4)learn by doing (instead of being solely dependent on other professionals). In your case, if you're in Costa Mesa, look to move to the Inland Empire ... or better yet, if you can swing it, move out of SoCal (Phoenix?, Vegas?). It is a sacrifice, but well worth it in my opinion if you're serious about learning real estate investing by doing (the best & only way). Feel free to PM me if you want more details.