Unfortunately Crohn's and UC are vastly different. UC is only in the large bowel (colon) where Crohn's is in both the small and large bowels.
There are a lot of new immunosuppressants that have shown a significant improvement on symptoms and putting the disease into remission. The most important thing is to NOT let your doctor put you on any type of steroids for a long period of time. This can cause other complications.
I'm a retired GI nurse and my husband has UC, luckily his has burned out, but being diagnosed with Crohn's at this point in your life, I definitely recommend getting on the lowest immunosuppressant, like Skyrizi, that works great without severely compromising your immune system.
As far as diet, everyone is different. Most GI doctors will tell you to increase your fiber intake but for some people that's a trigger. The best recommendation I can offer is when you're symptomatic and experiencing discomfort then follow a clear liquid/bland diet. My husband's go too has always been egg noodles with a little butter 🤷‍♀️.