Tone sorry to hear that… I moved to San Diego when I turned 18… lets just say that was more then 25 years ago… anyways before that my family lived close to that area.
Not sure of the best route but if you are up on the hill in Westchester, you should be able to go where Lincoln starts as it branches off from Sepulveda near the airport. Take Lincoln down the hill into Marina Del Rey… Get down to into Marina Del Rey (by either taking Lincoln to Washington or turning off of Lincoln preferably to hit Admiralty) and go towards the beach. Park on Washington before you hit Pacific… Then walk north… It is nice and will save you from dealing with the harshness of Pacific down in Venice…