I have a specific bequest to me in a will, but am also named a beneficiary of a trust in same will. I inherit both? How do I find the amount of trust

Although no one can tell for sure without seeing the document, from your description, it does appear that you were both left a specific bequest and named beneficiary of a trust.  Many states require that the trustee provide an annual accounting to beneficiaries 25 or older.  But if the trust is created by the Will, no one can tell how much the trust will hold until probate is completed:  until your grandmother's assets are collected, her debts paid (including filing her most recent income tax return and paying any property taxes) and the remainder distributed according to her Will.  While there is substantial variation, the average time required for this is two years.