tbeck,
Welcome to the forum and congrats on working your way through your Bucket List. Some have suggested that other than mask, fins and snorkel, hold off on buying your gear till you have decided if this is a long term hobby (obsession) or a short term check on the bucket list. even if it is a long term hobby, there is some wisdom in getting a few dives in to try different things and see which works best for you. (Many things in diving tend to reflect personal preferences and what works great for one person may be horribly awkward for another.) The are two things though in addition to mask fins & snorkel that I would recommend that you get. Get a regulator mouthpiece and some zip ties. When you rent a reg set, you never know how well the local dive shop has sanitized the mouthpiece (especially in some of the corner of the world that have amazing diving). When you rent a reg set, simply remove their mouthpiece & put yours on and then when you are done, put theirs back on and keep yours. The mouthpiece fastens to the reg with a simple zip tie.
Welcome to the sport, and to the forum.
Thank you! I'm okay with (what is jokingly referred to) "the 30 second rule". I would rather pick something up off the floor and stick it in my mouth than, say, something that has been in another human's mouth. My ex lost his leg from an antibiotic resistant infection acquired in a so-called "sterile" operating room. I'm sadly too familiar with the germs humans carry and the speed at which they grow.
I've been looking at regulators for many reasons, including this one. So far I have been leaning toward the Scuba Pro MK21/350 -- first and second stage. My dad is on oxygen, I know it is different, but I fill his portable tanks the main machine, attach his regulator, adjust oxygen output, etc. The connections and the service for the regulator are a concern and I would like to see the various options. I can really use some input -- I do like the Shearwater dive computer and blue tooth wireless integration with tank -- this is quickly becoming my favorite option. Making sure the equipment I buy has the capacity to adjust to ever changing needs and initial purchasing mistakes, while still being comfortable, etc.... I do appreciate everyone's input because I am looking at things I hadn't previously considered; things that appear to be a better option.