Hi NEE,
Welcome to EFT and the world of tapping!
In my experience...
Unhappy adrenals+confidence issues+addictions+depression = a lot of childhood events where it was not safe to be you or many childhood events where a big emotion is fear.
So, the simple formula is:
1. Ask yourself for one incident in childhood which when you think about it now, makes you feel unsafe or fearful.
2. Tap on it until all feelings about this incident are zero.
3. Then, and only then, test that it really is zero by vividly imagining it. If not down to zero, EFT again, and carry on until it is zero.
4. Go back to 1 and find another event.
Keep going like this until all incidents that come to you are zero.
It is definitely nowhere near a one-session thing, so be kind to yourself and persevere; you will be pleasantly surprised with your progress :-)