People who drink milk subsitutes. I need help?

I have always drank cows milk. For the past few months I have did a lot of studying and have found that milk substitutes such as quinoa have more to offer then milk.I have taken my children off of cows milk this is there first full day off of it. I got the grain quinoa not really having a clue lol what I was doing I made something lol and my most pickiest kid liked it.I on the other hand thought it to be BAD but would never say a thing I just sucked it up and bottom’s up! Anyhow so being new to this can anyone give me tips and web pages on the highest vit source of a milk substitutes and also recipes.Any info on why milk substitutes are better anything.My little one is 17 months old and I am still nursing but I don’t want to start him on cows milk that would be a know brainier if I want to do milk subsitutes.PLEASE HELP!