Irvine is on the safest cities list, but it is rather conformist and you have to drive miles to get anything accomplished. It would take more than an hour to walk to the nearest convenience store. That said, it's also a bit more expensive for some goods and services for all the 'rich' people live there. Not as exorbitant as LA county though.
There is something I Googled called Orange County Asperger;s Association on Meetup, from what I was able to dig up I didn't feel like I would be acceptable to them. The only other alternative I saw so far was something at Saddleback Church in Lake Forest, which borders Irvine in some places. That group is supposed to be facilitated by a doctor who specializes in the spectrum, I would like to check that one out myself.
I'm in Garden Grove, which is roughly a half hour drive to the heart of Irvine. Many cities here have weird boundaries so you can easily pass through 4 towns driving a few blocks. That said, despite a somewhat lackluster reputation, Santa Ana has many nice sections that could be mistaken for Irvine or Tustin, the homes there are a little better of a price-to-features ratio and it is the center of all the important matters that keep OC functioning . Just don't move near 17th/Bristol if you value your sensories, personal space or your time.
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Let's go on out and take a moped ride, and all your friends will thing your brain is fried, but you can't live your life too dirty, 'cause in the the end you're born to go 30