Well, I doubt it's flawless. But maybe you mean the first 5 moves or something.
Blitz will be very difficult for such a new player. Most blitz players, even at low ratings, are experienced. So the first few moves can easily be sensible (pawn or pawns in the center, development, castling).
Although at some point you should run into players who do bizarre no-name openings. Or they play a particular setup against everything and just hope it works out.
Oh, but to answer your question, openings aren't that important. General knowledge, tactical patterns, and a very consistently, habitually, checking for blunders is what's important for many rating points to come.
I'm a new chess player, I have literally read a few books from end to end to learn how to play [totaling 1 week now] (all the basics, end game, pawn chains, italian game, g.piano, evans gambit) and I have been astonished time and time again at players at ELO 1000 capable of literally dodging anything I throw at them, and / or playing the best move in a gambit.
As black I find myself being terrorized by openings and traps/gambits and so I grabbed a book on the sicilian / english open and drew up a map of all my lines because the english open is terrifying to me, so much theory. And my opponent played flawlessly. I even punched it into a computer afterwards to see how a computer plays and it was exactly the same way. (Opponent: ELO 1030 Computer: ELO 2200 ish)
Did I assume wrongly that my being clever with a complicated opening was going to go extremely badly for me? Or am I simply out classed to be in 1000 elo? How many openings are you supposed to know at what I thought was an average beginning players level? Is there a list of openings to memorise somewhere that I'm not aware of? Or is this simply down to experience.
Thanks guys, I'm trying to plug holes in my game to prevent making bad habbits so any help understanding what I'm missing here would be great.