Then I thought I could just buy one in Arizona when I went for a visit, but read that you can't do that and bring it into the state.
You can buy out of state, but the firearm has to be shipped by seller to CA FFL dealer where you can DROS it. Which usually means paying extra for shipping and storage fees.
I'll get something eventually. I'll check local shops in a day or two to see how busy they are and if they require an appointment.
It's largely back to normal.
Don't forget to buy ammo at the same time.
We can't buy ammo online or out of state anymore and you need to go through background check with every purchase.

Only criminals can bring guns into California?
Pretty much, same with the ammo. CA legislature is extremely anti-gun and each year they dream up some more toejamty anti-gun laws. Can't really tell how I feel about because it would lock the thread instantly.