There is a nepali group in facebook for bay area rooms and rents. United nepalese in bay area. Join this group and people will help you find one for u. Hope this helps. Also there is one called indian flats and flatmates. Hope you will find room soon. Its expensive in bay area. Be prepared.
Room in Irvine? There are around 10/20 nepali houses in irvine and southern orange county. If you need apartment just google it.., If you drive try to find apartment in tustin or anaheim area those location relatively cheaper and easy to commute . if you can afford Irvine is best place to settle. Good luck