I suggest you study one opening at a time. If you play several games of GMs within the same opening can you learn the patterns and ideas more easily in comparison to study them all together. At least, that is how it has worked with me a few times.
I haven't done it much, but playing GM games gave me more insight in openings then studying opening books.
Every opening is flexible as long as you like the positions that arise from the play. What type of positions do you prefer? Do you get those when playing Sicilian?
I have only recently started studying openings. I has to select one as a starting block and decided to go with the Sicilian. Specifically, the Najdorf. Now, I know that sounds ambitious (based on face-to-face feedback), but I want somthing with flexibility.
Now, should I explore multiple openings at the same time or would I be better off studying Sicilian exclusively until reasonably comfortable with it?
Or should I even begin with the Najdorf?
Thanks