Usually the gut movement starts few hours post takedown. Mostly nothing but dark green liquidy output comes through. I started eating food the next day and pooing the same. Start walking as much as you can. Do kegels alot-alot. I still do them. They'll strengthen the muscles at bottom. Get a good protectant cream like ilex paste/sudocrem and start applying it regularly if you're going often. There are no set rules everyone's recovery is different. I was doing 10-15 trips for the first few weeks so the butt burn was equally bad. Get a bidet and soft tissues. Never ever rub the bottom with tissues. Once the pouch is a little stable you can add fiber supplements to thicken the output. Many folks use imodium from start to slowen down things.
Eat foods like bananas, sweet potatoes, breads, butter, nut butter( smooth if you can tolerate them) , yoghurt, egg whites, chicken, turkey, fish in heaps. Except nut butters none of the foods have ever caused me any issues
Stay away from fresh fruits/vegetables for a couple of weeks. I still cannot do a big serve of salads. Don't eat whole nuts or foods with a skin. Dairy is a personal choice. I can do dairy so I've been drinking milk 2-3 glasses since takedown.
Stay away from processed foods, artificial sugars and fried foods for a few weeks. Sugar still kills my pouch . Anytime I consume it in large amounts the urgency increases.
You can add multivitamin tablets, zinc supplement and other after consulting your GI. They'll help balance the body's nutrient levels.
Wish you a quick recovery 👍