@Ethereal Cruiser
In addition to reading, and posting on, this Solo Cruisers board, you should also look at the boards for the specific cruise lines you're most interested in. If, for example, you're interested in Holland America (HAL), there are always (if you scroll back in time) threads on the HAL board with a title like "What is it like to cruise solo on an HAL ship?"
I've only cruised solo on Princess (three times) and NCL (once), but I've taken cruises with my wife on five or six other lines---mostly on Cunard, Silversea, HAL, and Oceania. The only one that, from my observations onboard, is not good for solo cruisers is Oceania. It's way more "couples oriented" than the others. (Of course, others may disagree, which is why reading a range of opinions on these boards is a good idea).
Have fun!
Jim