american ginseng vs. ashwagandha?

Hi,

My adrenals are weak right now - low cortisol and I can't handle stress or any exercise beyond basic walking - even walking more than 25 minutes will make me feel quite tired. Also problem falling asleep at night, can't sleep until about 2 or 3 am.

Anyways, I am very interested in following in Unyquity's recommendations along with Dr. Schulze 's teachings for healing. Uny recommends taking a tbsp of ashwagandha 3x a day to heal the adrenals. I am personally wondering what the difference is between that and American ginseng. I have a bottle of grounded roots of the ginseng (very expensive) and am wondering if I could use that.

I understand that they are both adaptogens, but is one of them more stimulating? One of them better for the adrenals? Whenever I take the ginseng I feel more awake, but am not sure if will cause any sleeping problems to get worse

Thanks!