Congratulations on the takedown surgery! I had mine earlier this year (in February) and can share a few bits of knowledge from my recent experience.
1. I despise taking opioid based meds. Every time I would have any surgery or procedure they'd write another script for tylenol-3 or stronger, which basically means if I wanted to kill pain I had to not drive, and be a zombie for the day. When I'd stop taking it, I could feel my mood just sitting in the dumps for a long time, over a week or two sometimes depending on how much I had been taking.
After takedown, one of the biggest issues I was having was the feeling of having to go. It was not just a nonchalant "hey you should go use the bathroom." It was a very urgent and painful feeling. I actually scheduled an appointment with my surgeon to be examined because I thought it might be inflammation or pouchitis. He found nothing of the sort and chocked it up to needing to adjust to my new body. Which never happened on its own.
My solution? This is gonna sound wacky but I found a high strength turmeric extract with bioperine. There are a few formulations, but veer towards those for body (meaning avoid ones that are complexed with phospholipids like Curcubrain, for example) and stick to stuff that's intended for full body absorption. As far as how to dose it, I found the best result by taking a full gram all at once in the morning, with some fat if possible. The fat helps it to absorb (as does the bioperine in the actual pills - don't get one without this ingredient). People look at me like I'm a loon when I tell them I use turmeric for pain but it has been magical for me personally. Bowel movements that previously would have been prefaced with pain and urgency now just come when I get the sense that it's time to go.
All that in mind, remember that you just underwent a procedure where they mess with your intestines which means the whole thing sort of falls asleep to some degree. I remember when mine woke up, I had some SERIOUS cramping for the first week or two as it started to get that peristaltic action going again. It's a big muscle after all, right?
2. Urine for me was similar. I had a lot of success simply standing. This is how I avoided getting re-cathetered multiple times throughout the process (I wasn't so lucky after the first surgery... I decided then and there I'd learn how to never get something shoved in me like that again). Basically just standing up and walking around, rather than sitting, when you know you've got some urine in your bladder, helps to increase the urgency and agency with which you can feel the right muscles. After they hit you with all the strong drugs and play with your insides, your nerves seem to lose that mind-brain thing that lets you say "push when I say push." Let gravity help you out and push things down for you. As your nerves reboot it gets a lot easier, as with the bowels. Things might still be waking back up for you!
3. First few weeks of recovery, just try to stay mentally positive. Don't beat yourself up for not being at some certain stage of recovery where you think you should be. Just take it by the moment, and do what you can, and what you feel safe doing. Your body just underwent some serious changes and will do some adjusting. Eating will not be as much fun at first because of the pain you will inevitably feel (but I hope you try the turmeric - if you do let me know how it goes!). That was probably the biggest weird thing for me: I had gotten used to eating things and watching it come out of the bag hours later and didn't really feel discomfort from that. When I was feeling the pain just from eating and having to poop I started to think "what have I done? was this a mistake? oh no!"
Ditch the doubt. Just stay positive. Know that there is light at the end of this tunnel for you.
(p.s. I HIGHLY advise installing a bidet lid on your toilet. This is probably one of the best investments I've made with regards to my hygiene and my disease/J-Pouch. Pooping will be much more often than before, particularly as you adjust your diet. Staying clean helps tremendously not only with preventing further problems, but also with your own confidence and comfort. I sprung for one with a few extra features, but you can pick one up for much cheaper and it's WORTH it. )