"What is life like in California? "
California is something like 5 different state: So Cal, Central coast, Bay area, NorCal, Central Valley. What life is like depends on where you live.
SoCal is dominated by LA, but San Diego, desert, mountains, and Ventura/Santa Barbara are vastly different from LA.
Central Coast ranges from paradise: SB wine country, SLO, Arroyo Grande to rural/dumpy (Santa Maria).
Bay Area is rich and vibrant and crowded as heck.
NoCal is beautiful and rainy and rural and isolated.
Central Valley is hot, poor and limited in opportunities (but is also the gateway to California second (or first) paradise.
Some of these areas are very crowded. Some are not. Some are very expensive. Some are not.