Hm... you don't even know if your body and mind are "ok" with diving yet.
I know people that went through OpenWater training only to realize that their body doesn't tolerate it (sinuses, ear drums are just the trivial examples), also people that have a overwhelming fear of sea grass or the sight of the body of water above you at depth of 5+ meters. And these folks are brilliant swimmers and in excellent physical condition.
You may go on a journey where you might realize in the beginning that there are barriers you cannot just overcome, pushing yourself harder and eventually risking your health.
If I were you, I would take the open water course seriously as a student and then use the first 20-30 dives improving your skills with the same instructor who took you through the OpenWater. This will mitigate the risk of having conflicting "wisdom" thrown at you while you still don't have the experience and knowledge. And again, it's very likely that everything you hear will be correct, however without experience, you will tend to consider it true or false, while with experience the nuances start to appear. And you can take the training in some warm water conditions with light and thin wetsuits (or shorties) to naturally learn your body buoyancy, before you start adding complicating factors like thicker wetsuits for some other locations around the globe. I personally prefer warm water diving.
And only then the plan you have might have a good chance of success and you can continue the path with AOWD, Deep, Nitrox, Rescue, DiveMaster.