Very similar to #1. Diet but I try to keep it very simple (and also not hyper fixate on it). Just make sure I take in less calories than I expend. My meals are pretty much the same, so I don’t focus much on tracking as I’m steady now. I do exercise but try to make it not seem like it as otherwise I won’t do it. If I’m having a flare I won’t, but try to do walks a few times a week. Then strengthening exercises in daily routine
Biggest thing o noticed with me with exercise and it continues still is if I start too many things at once or progress to fast I’ll flare up symptoms, so I need to start slow. And with that working on strengthening the big joints so it can build muscle and support harder exercises and actually helps the POTS. Focus on hips especially and then shoulders. It gives you a good base of support to build off of.