its chicken much better than meat bcoz it contain good protein which is essential thing for growing muscles
Check out the first page for these things, I talk about some of the concerns that people had in the first page:

But yeah like I said before if you want to try, make sure to take a multivitamin everyday that has Vitamin B12, also add some grounded flaxseed to your diet too. It's easiest to start with vegan meat substitute foods, they taste really good, and you can basically eat that your entire life too and be called a vegan. But most likely you'll want to try out different recipes in the future.