Good for you for trying to get your life in track, but honestly, switching to no-meat will not somehow make you feel 100% better. Here's why:
People who only eat meat without any breads and sugars can lose weight as quickly as people who become vegans/vegetarians. Look at the /r/keto subforum on reddit.
You have to understand how the body processes fats, proteins and carbohydrates. Everything you eat has a chain reaction in your body, it releases hormones which tells your body what to do. Eat a bunch of sugar/carbs? Your body is going to release insulin to tell your body to start storing some of that energy (aka body fat). Big insulin spikes lead to you feeling like shit, especially when you're older.
A few years ago I was a 250 lard ass, now I'm at 190 and can dead lift twice my weight. Can't deal with baked chicken because it doesn't have enough taste? Rule #5 - Harden The Fuck Up, getting in shape isn't some walk in the park, you gotta work for it.
I'm doing Leangains until I get to my target weight of 170. I haven't felt so strong and healthy in years.
oh and Hi I'm back!
P.S If you think you can supplement animal protein with beans or soy, you're going to be eating a ton of carbs and isoflavones (which acts like estrogen in your body).