It didn't work initially for me either.. But it works pretty well now.. Lanterns and chick peas have lots of protein.. (specially the black chick peas, which don't have any term for in English but they are available in desi stores)
Also milk based and soya products have lots of nutritious thing. No meat needed at all.
Beans are awful for me, they give me terrible indigestion as much as I love them, I so love humus and falafel, but I can eat them like once every few months lol
All grains are bad for me too, including bread and rice :( I wish I could digest those I assure you I'd be in heaven. I drink soya milk, I love it, also other soya products, but they say too much soya is so bad for one's thyroids.
Unfortunately animal protein is the safest thing for me, I feel a lot better on it, believe me I have many many many years of trials, I keep trying and trying with vegetarianism, or even fruitarianism , but my health just fails on a vegetation mainly diet.