Is vegan new to you? Do you mean macronutrient balance?
Are you considering strictly vegan or mostly vegan? Do you intend to use some mock meats or are you going whole food plant-based?
So much good advice at https://nutritionfacts.org
I personally eliminated most fish and meat from my diet when I was diagnosed with gout. After an initial painful period, which I think is the body flushing the uric acid, I have been pain-free. (I DO take allopurinol too).
Because I was using medical marijuana for the pain the first few months, I also ate a fair amount vegan junk food. Pizzas, cookies etc. Still, I felt lots better and no gout.
Later, moving to mostly whole foods, most of the time. I feel fantastic and losing weight without really trying and all the bloodwork is headed in the right direction.