What particularly are you looking for in a "getting started" tutorial? Honestly, you should just plunge in, on some side project (or a mirror of whatever projects you've used MySQL on) and just compare.
This is a lot easier to say than do/live by, but I think you shouldn't invest in one tool choice when you haven't given the others a fair shake (once you have enough time to step back and think about your decision).
What particularly are you looking for in a "getting started" tutorial? Honestly, you should just plunge in, on some side project (or a mirror of whatever projects you've used MySQL on) and just compare.
This is a lot easier to say than do/live by, but I think you shouldn't invest in one tool choice when you haven't given the others a fair shake (once you have enough time to step back and think about your decision).