I'm sorry about your mother's death.
We don't have a formal "reading of the Will" or the trust in California, but your mother's Will should have been lodged in the probate court located in the county where she resided within 30 days after her death. Some counties have their probate records on line, so you can check the county's website to see if that's been done.
If your mother prepared a living trust, you are supposed to receive a complete copy of it. You have a limited amount of time after you receive a "Notice to Beneficiaries" in which to file a contest if you disagree with the trust.
And if the estate was worth less than $100,000 then there doesn't need to be a probate proceeding - the heirs can file an Affidavit for Small Estates to collect your mother's property.
This information is not intended to substitute for professional legal advice and does not create an attorney-client relationship. You should accept legal advice only from a licensed legal professional with whom you have an attorney-client relationship.