Hello, welcome to the forum
I'm sorry you've needed emergency surgery, but I'm glad you're healing well and you seem to have a good attitude which will really help you in the long run.
I personally had a resection a few years ago, but I didn't have a stoma so I can't give specific advice about that. I do however know that there are many people on here and in general who have gone on to have reversal surgery successfully and with few long term issues.
Generally, make sure you get plenty of rest, your body has been through a lot in the past few weeks so don't be surprised if you get a couple of set backs or you find it takes a long time to get back on your feet. Try to keep your fluids up as its easier to dehydrate with Crohns and especially with a stoma, but be careful not to drink too much plain water adding juice or drinking electrolyte drinks can help.
In terms of food, some people with stomas find they can't eat particular foods, especially those high in fibre, but others find that they can eat almost anything, so it could be a bit of trial and error to work out what suits you, but initially its probably best to try and stay away from nuts, seeds, sweetcorn, popcorn, mushrooms and other high fibre foods.
Have you been given an appointment for follow up with your surgeon and/or a GI? You will need to have careful monitoring to ensure that you're healing properly and to check that your Crohns remains controlled, most doctors recommend starting a medication after surgery in order to try and prevent a relapse, but this is dependant on the individual. You should also have blood tests on a regular basis to monitor your inflammation levels and to check for vitamin and mineral deficiencies as people who have Crohns can struggle to absorb food, especially those who have had some bowel removed. In particular, depending on which area of bowel has been removed you may be at risk of B12 deficiency, iron deficiency and calcium deficiency, these can all be rectified with supplemenets, but do need to be monitored.
If you have any questions or concerns, or just need to have a vent about things, please feel free to post at any time. We're all in the same boat, we all understand the unique difficulties of dealing with chronic illnesses and there is no judgement here.