How to do naap jaap?

I am sorry if this is a stupid question. I am heavily inspired by Premananda Maharajji and he always talks about naam jaap. I am a Hanuman and Shri Raam bhakt. I have started chanting “Jay Shri Ram” mentally or verbally. But I am scared I am doing it wrong. Is there a specific way to do naam jaap? Can I do it even after consuming non-veg?