I haven't really introduced myself to the group, but I eat a Plant Based diet, mostly for health, but also for the animals. Your story sounded very similar to mine, so I just wanted to recommend a couple of websites to you. I know everyone is different, so this is only my experience, but I believe the principles given by Dr. McDougall and Dr. Esselstyne really do change your health for the better.
https://www.drmcdougall.com/
http://www.dresselstyn.com/site/
Both sites have great advice for eating a vegan diet, and have great recipes (I got their books from my local library). If you're on Facebook, Jeff Novick is a Plant Based dietitian who has a lot of resources for people just starting out; and Vegan Radiance is another great source and a great inspiration! My favorite recipe site is at fatfreevan.com - actually there's just tons of free resources out there for you, but those are the ones that have helped me the most.

Basically - when I follow their plans, I lose weight, and all my health numbers are perfect (actually better than perfect). I'm back here because I fell off the wagon - and the weight I've gained back has caused the health problems to return. I've been back at it now for 30 days, and this time hopefully it'll be for good. Following a diet temporarily just doesn't work - not for me anyway. It's a lifestyle. Good luck!

Feel free to follow me for help with your Vegan transition.