My question involves estate proceedings in the state of: CALIFORNIA

First, my apologies if this is not the correct sub-forum to post this thread. I could not identify anywhere else where this question belonged.

I received a CA Advance Directive template from my doctor's office (Form "3-1" from California Hospital Association's website) and am beginning to ask questions (this forum, hospital's social worker, doctor, et al). My question for the forum is: when choosing not to prolong life, am I required to designate an Agent for the Advance Directive? is this a reasonable decision or not wise? what kind of questions should i be asking the social worker and my doctor (if any among you can recommend)?

thank you.