Welcome @VMDrummer, sorry to hear you are suffering, as ever, but you will find everyone very friendly on here, I hope it is a useful resource.
There is much debate on diet, though the generally accepted one is called the “6C’s”, but I’d start with eliminating alcohol and caffeine. Salt intake is not usually considered in a MAV/VM diagnosis, so I’ll leave that one up to you to experiment with and/or get guidance from your physician.
Try not to adjust your lifestyle too much imho, avoidance can often make things worse in the longer run, but it’s really personal.