We are trying to do probate in San Francisco for our father's estate.. We filed the will soon after he died..but they just said it is not the original

It would not be legal for a paralegal to help you with paperwork; that would be what is called unauthorized practice of law. You can probably locate a competent lawyer who will handle the probate for a negotiated fee which is less than the statutory fee. But I see some red flags here. There are multiple inheritors, but no intent to sell the house? I would think whoever does not intend to live in the home would want their share in cash. You should be aware that if siblings inherit the home jointly, and say, three out of four siblings agree to give their share to the fourth, 3/4 of the home will be re-assessed for property taxes. So I would strongly advise you to work with an attorney. There are steps which, if taken in the right sequence, can help with the property tax issue.