Honestly, and keep in mind, I say this as a HUGE fan of this game (it's easily one of the best fighting games gameplay wise in the history of the genre), i'm going to tell you - wait.
Sure, you'll be a little behind when you do decide to pick it up, but the combos are pretty easy to pick up, probably the easiest in the series. Fundamentals are what is really driving this game right now. Fundamentals & execution of course. The demonstrations & tutorials yesterday did a good job but I feel like you might get more for your money, and potentially more enjoyment, if you wait at least until the June update that is set to introduce the cinematic campaign.
If you're willing to trudge through what us early fans are going through, more power to ya. But I have the supreme confidence that this game will be far more approachable, and be far more fleshed, the longer you wait for it. It's aging like wine.