Southern California has different soils and climates from the coastal area to the mountains. I would recommend going to the Plant Finder on Sunset. Com plantfinder.sunset.com/sunset/plant-home... You will need to find your section of So Cal and it will give you your climate zone and plants suitable to your area.
In southern California locations, avocados were planted by various people who introduced and planted seed from Mexico and Guatemala.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.