Going vegetarian

So I’m allergic to chicken and beef and have decided to go vegetarian starting tomorrow. I’ve been having some health issues and these kinds of food allergies present themselves in ways other than hives and anaphylaxis (ex: digestive issues, headaches, fatigue). I’m looking for some tips on being vegetarian, and I need lots of will power because I do love meat and not eating any is going to be pretty hard for me since I eat it almost everyday. Any help is much appreciated!