I've been making amigurumis for... a year, maybe? I forget.
But I only now managed to try starting with a magic ring. And it's so much better!
With chain 2 start, while it's easy, there sometimes remains a sort of bulging chain. If you use the chain two you probably now what I mean.
But with magic ring the first round is all smooth and pretty. No bulging. Here is a great tutorial.
I'm not going to change my previous patterns (lazy!), but when it's mentioned to start with "chain 2", you can of course start with magic ring. In fact, I recommend it.