I am also fairly new to chess. One problem I found with memorizing openings is that your opponent may not know the opening either. So you may know 6 moves of sicilian defense but your opponent plays some random moves.
Then all your studying is out if the So at the lowest level it may be more useful to know the principles: go for the center, develop your pieces, castle, rooks to open file etc.
Maybe memorize some cheap tricks to avoid them. E.g. your opponent wants to pull scholars mate or similar things on you.
This book help me a lot to not memorizing openings move by move and improved my game. The ideas behind the chess openings - Ruben Fine, licence free.
http://www.chess.com/download/view/fine-reuben---the-ideas-behind-the-chess-openings