Lots of corporate and 135, but it helps if you know someone. Might need to get a CFI job to get your foot in the door and get to know some folks.

SNA, CRQ, and MYF have FBOs, schools, and plenty of kerosene burners.

HMT and SEE have thriving GA populations.

L65, OKB, SDM, RNM are not as busy but might have a CFI opportunity.