Just diagnosed with celiac, looking for advice

I was just diagnosed with celiac yesterday. It was my third endoscopy, after the first two came back inconclusive. I had a hard time yesterday because I had very little food in my house I could eat, but also wasn’t able to go to the store. I’ve joined some Facebook groups that give advice about celiac, but I was just wondering if there was anything you wish you knew when you were first diagnosed. I’m not new to confusing and overwhelming diagnoses, and always find that hearing from people who have the same thing is helpful! Thank you for any advice!