Gabe, sponsors aren’t professional people in AA. They are all lay, therefore good, bad, and inbetween. It can be a minefield, I know, from experience. Instead of taking the word of everyone who posts on your thread, I’d select a couple of people, with years of sponsorship, and ask their opinion of what to look for in a sponsor. Obviously, your personal preference is important, too, your intuition, which kicked in with the sponsor you’ve decided isn’t for you.
When the Big Book was written by BillW, there were no sponsors or meetings included within it. The Steps in the Big Book were meant to be a complete guide to a spiritual experience sufficient to remove the desire for alcohol. As last century wore on, other aspects were added. I’d recommend posting in the AA section of this forum, there’s lots of experienced AAers there, including Gottalife (Mike) and Ken33xx.