Hey there. I too am extremely new to AI. I was diagnosed just this last monday, and before that have been in bed for 6 weeks straight unable to function, and in ER 5 times during that. See my post 'new to AI' for the story.
As for supps, there's alot of great stuff to take for the adrenals. If you have severe AI like me, or straight addisons, you HAVE to have cortef, which i learned the hard way yesterday. I was taking too little, and felt like i nearly died yesterday, lost control of my body almost completely, heart was racing and BP dropped i thought my heart would fail.
I'd been on alot of the adrenal supps.. but probably not long enough (apart from licorice extract).
The best site most people use for a combination of medical and natural stuff for AI/Addisons, is Dr Lam's info here: http://www.drlam.com/A3R_brief_in_do...al_fatigue.cfm
It's got great info, and details on meds and supps that help the adrenals and nervous system etc.
when it arrives in the post, I will be using Pantethine (bioactive b5) as it's the most important for the adrenals. Not sure how much it may help now that im on hydrocortisone, but may aswell try keep the glands alive.