(I'm up past my bedtime, so forgive me if this post is a little incoherent)
It all depends on what you plan to get out of your experience with the Tarot. Based on my understanding of how Tarot readings work, once you've mastered the use of your current deck, you can easily go the rest of your life getting accurate readings and never need buy another deck or bother memorizing the RWS system. Because it's not the system that matters; it's having a store of meanings and associations to fall back on, combined with the ability to intuitively interpret the cards while in the act of conducting a reading, that makes a cartomancer.
It's true that it's easier to find learning material based on the RWS, but if you're not interested in memorizing other people's card meanings, that isn't really an issue, is it?
That said, if you're going to be spending a lot of time on this website, at least a passing familiarity with the RWS would be beneficial. I actually read almost entirely with playing cards or the Tarot of Marseille, but I started my Tarot journey with the RWS, and I fall back on my knowledge of it when interacting with other Tarot readers online. Also, if you're like most people, you'll soon start buying up a storm of decks, and most of those will probably be based on the RWS. This means that even if you don't make a special study of the RWS, eventually you'll start noticing common elements between the same cards in different decks, which in a roundabout way will lead you straight back to it anyway. It's kind of inescapable like that
So do as thou wilt, basically, once thou hast determined exactly what it is thou wilt do. And have fun! Your journey is just beginning