Welcome to you! There is a lot to learn at the beginning but I'm sure you will figure it all out!
Many people here will suggest you start by getting away from packaged foods for a while to help aid in your healing. Some suggest up to 6 months. Everyone is different thought so you need to do what is right for you. So people are extremely sensitive that they do need to research manufacturers or stick to those with certifications. Some can manage with anything that doesn't have gluten in it and are fine. You will have to see where you fall in the scope of things.
Also, it is often recommended that you try and stay away from restaurants in the beginning to try and be as true to the gluten-free diet as you can be.
Again welcome and I'm sure others will be around with more thoughts for you!