Hi Sparks, welcome to the world of paragliding! :D
like you said
"And you can pack it in your car and no hangarage or anything . It must be the easiest access flying available."thats why i started this back in 2003. No matter where i go with my
friends, i always have my bag with me and if the weather is ok, up & away!
My first flight was also a tandemflight in switzerland/klosters-davos,
after that i bought an old paraglider (1991) from ebay very cheap and started
training alone with just a book LOL.
I cant recommend this to you, dont do it, go to a proffesional school,
without the right knowledge this sport can kill you.
I dont know any school in California, never been there, so i cant help
you with that, but if you have some special questions, i will answere
it. In this sport i found peace, playing with the nature, flying around
for hours alone or with friends, enjoying the view & silence.
here now some pics from different locations:

2003 Switzerland / Klosters-Davos first tandemflight

flying Ebay crap, very riski! ;)

2004 Austria / Stubaital , yes i flown through the Clouds ;) /me crazy

2005 Slovenia / Kobarid

2005 Austria / Carinthia , just starting from the Emberger Alm.