Nanny/driver/overnight Sitter Needed For 2 Adolescent Boys (11 & 16) In Laguna Beach.

Hi, I am looking for a babysitter for 2 teens in Laguna Beach. My kids father (and my ex husband) has had an injury that has recently left me a full time single mom. There are times I need help day to day after school, and other times where I need to travel out of town, but have no one to stay with my boys. I am looking for someone that could handle after school driving to/from activities and also overnights and/or full weekends. I would prefer someone who could help out with homework (for my 12-year-old) and someone who has their own car. My 16-year-old does not drive yet, but is a good kid and pretty self sufficient. I am able to commit to a minimum of 20 hours a week but it likely will be more. My days/schedule are flexible.