@David Le I live in Irvine, a few blocks South off the 405fwy near Irvine Spectrum, You're not going to be able to execute your plan in South Irvine at the price point you're targeting, I think there are some options as you go North or further inland which I'm sure that's not as desirable for you.
If you prefer to stay in South OC, Mission Viejo may be an option in the older neighborhoods away from the Lake, other options are Lake Forrest, Laguna Niguel, and maybe Aliso Viejo, the problem I'm seeing is most of these neighborhoods have seen a run-up in prices as most people that got priced out of Newport, Laguna, and South Irvine have travelled further South to these cities.
One of my first OC properties was a Condo near South Coast Plaza which I got as a short sale, It was a two bedroom and I rented out the other room while I lived there for 16 months to satisfy the 12 month Owner Occupant period.
As a newbie, your first property may not be in a Class A neighborhood like South Irvine if you want to be profitable on the first deal, and not prepay your cash flow by putting a very large down payment on a deal. Most recently I was looking at an REO in Placentia, that's how far inland I had to go to find something in OC that wasn't Santa Ana, or Anaheim.