What is a new thing, a new something that you have recently gotten into, or that you have been a long time participant in, that you find very entertaining and fun and time consuming and distracting?
What things would we need to purchase to get into that thing?
How did you get into that thing?
What you need to get started is training. Dive certification will run around 500. You can find some shops that charge a bit less and some that charge more. The biggest thing in the agency alphabet soup is to find a shop that truly teaches and then plan to do advanced certification as well. If you can travel to do the Advanced Open Water certification do it, a week somewhere warm with some diving is worth it.
Things you should really buy: mask, fins, and snorkel. Buy it before you start the class. You can go on Amazon and buy any cheap mask and snorkel set where the mask has a tempered glass lens/lenses. Skip the dry top snorkel, they don’t really do much other than cause issues (I have a design for one that would be amazing but need to prototype it first and don’t have the ability/funding right now.)
For fins you need a scuba fin, I prefer ones made for dive boots rather than barefoot ones. Then you can walk around in the dive boots and have more grip and a little protection vs being barefoot. The fins I use are Cressi Pro Light but if I was to buy a set today I would look at the SEAC Propulsion S. And buy yellow or orange fins, trust me.
After that a dive computer is a really smart buy. You have a couple choices there and they can get expensive. A good basic computer is the Cressi Leonardo series or the Mares Puck Pro + Series. I started started with the Mares Puck Pro and just updated to the Mares Quad CI but will use the Puck Pro as a backup. You can use the app that comes with the dive computer but if you use Android and want to keep all your logs in one place even if you change computers (and you probably will if you get started) DiveMate is worth it. It works with tons of dive computers and you can still have signatures in your logs. I haven’t used paper logs since my first certification. If money is no object the Garmin Descent Mk3i is one I (and many others) have drooled over.
Next is BCD and Regulator set. I’m looking at the Scubapro Hydros Pro with Air2 for my next BCD. Regulator I would suggest is the Scubapro MK25 with the G260. I use the MK20 with the G250, it’s a tank and works great. Grab a console with depth gauge and pressure gauge as well, if you can get one with a compass as well all the better.