Tustin skatepark is alright, usually pretty busy. Worth a visit. It's not far from Havard Park.
Volcom park in Costa Mesa is even wilder, busy as shit, but you'll deffo spot a pro or a vlogger there.
Theres a grindline park in Anaheim (Ponderosa) thats pretty good.
Laguna Hills has two parks, one is free and its packed with scooter kids typically. If you go early morning you can have some fun there.
Most of the other parks in the area were built in the early 00s boom and are either hunks of shit or just not worth it u less you're local.
I haven't stepped inside Focus skate shop, but I would go there before I'd go to RSQ, which is in the spectrum(an outdoor mall)
Diamond Jamboree, The District and Spectrum have a decent food for a date night