Im enjoying this thread.
you are so fortunate with the climate in LA.
I love clematis and climbing roses intertiwined or scrambling over bushes and trees.
I also am new to gardening, but have found to my cost to find out the soil ph, as certain plants require specifically alkaline or acid soil to thrive.
I have also studied the garden over 12 months to see where the sunlight is (rare in manchester, uk)
Lavenders would thrive in your climate, and there are so many to choose from which are great for bees.
how about a little wildlife pond, you could use a large planter and have watelillies, in effect im stating what i would like, and it may not be what you would