Strangely for me, drinking a couple glasses of wine every now and then really helps my digestion. My gastroparesis is a lot less severe than most commenters here though. I used to be quite a heavy drinker and I would get so sick during a flare up until I discovered that I was ok with small amounts of wine, and it cleared my system quite well and relieved my horrible constipation issues.

If you can’t stop drinking altogether at first, maybe try small amounts of wine so that you don’t have to quit cold turkey? Also I’m so far from being an expert here so I apologize if this is terrible advice. You should definitely look into support groups in your area, and possibly some counselling if you’re able. Good luck.