You can find iSport instructors in your area by following this link:

http://volleyball.isport.com/volleyball-lessons/r.aspx?&l=los%20angeles%2C%20california&k=&b=&ct=US

Send them a message and see if they'd be able to work with you in terms of pricing. If not, it's always good to check with your local park and recreation office. A lot of times they offer group classes that are perfect for beginners, and they can be really cheap (sometimes even free, but normally around $5-10/class). If you need help getting in contact with your park and rec office, let me know where you live and I'd be happy to help out!