My first cruise in the 80's was on NCL. Since it was my first, I did not have anything to compare it to. My travel partner had financial difficulties and had to back out at the last minute. I did not let that stop me. I don't NCL charged me a single suppliment. It was a smaller ship back then, compared to the monster ships they are building now, it was a baby. I really like the bigger ones.
Well, I sort of lucked out. While waiting to board the ship, I met a lady my age. She was traveling with her aunt, whom had lost her husband. We hung out the entire trip, like we were old friends, so things worked out for me. Dont Worry, you should have a good time.