There are lots of us here who never had a DUI, or went to the ER, or got fired, or got evicted - but we are alcoholics all the same.
I personally could never "taper" because once I have that first drink it is game ON. That said, if you are serious you should do it under a Dr supervision.
My DOC (drink/drug of choice) was pinot noir, and sometimes my husband's high IPA beer. I would think Jameson might have a tremendous amount of sugar so that is the "energy" or kick you experience.