Below 1700 or so, openings are mostly a waste of time and tactics rule the day. Learning the basic opening principles and two basic opening moves that you keep playing (one for white, one for black) and focusing on tactics [1][2] is in my experience the fastest way to advance. After 1700 or so, specific openings can be studied. I suggest playing d4 instead of e4 as white (avoids dealing with the Sicilian) and as blac…
Though I do well avoiding Sicilian by playing Alapin (e4 c5 c3).