Without going to dig out my logbook for a precise number, I would say it took me around 25 dives to get to the point where I felt somewhat comfortable. By "somewhat comfortable," I don't mean excellent or amazing or even good -- but rather just that I got past the total "OMG!" bumbling stage and felt like I had a modicum of control
if I was mono-tasking.
I did take AOW around that time, but I would not say it was that much of a help for me, in terms of buoyancy (including the PPB day). But then there is a great variety in AOW classes.
I think what worked the best for me was a combination of the following:
1) Getting my own gear that fit, and that I was able to make controlled experiments with (i.e. it was consistent from dive to dive unless I changed something). This was huge for me.
2) Practicing real diving tasks (compass, writing on slate) and and playing buoyancy "games" (limbo, etc.) while diving (not around coral or anything we could harm by contacting it). If we had a camera along on the dive (after we gained some control), we filmed each other, which was helpful to watch later to see what we were doing (not always the same thing as it felt like to ourselves!). Another practice thing we would do is, after our safety stop, see how long we could take to get to the surface. That helped with our control.
3) Reading Scubaboard. There are a lot of experienced divers here with good information.
4) Watching videos of good divers on sites such as YouTube (I don't have any mentors or anyone "live" to observe except my usual buddy, who learned to dive at the same time as I did).
It’s an ongoing process and starts over to some degree with major equipment changes.
I'm thinking that I'd like to learn to drysuit dive, and I know it's going to be like starting over. Not that I'm "there yet" even without a drysuit - far from it - but I mean that I know I'll probably be giving up what little I've gained. Temporarily, I hope!
Oh, which reminds me: The dive trip on which I felt like the very basic buoyancy comfort started to come to me was a summer trip in Florida. Not only was it my first trip with my own gear (hallelujah), but being summer I was able to dive with no exposure protection. I think that really helped as there were basically no variables in terms of personal/body buoyancy. I imagine that dive number would have been higher if I were diving someplace more challenging in terms of cold water or other situational difficulties. Shallow, warm-water reefs with adjacent sand are a really nice, "easy" place to learn. My first OW cert was in 58º water with loads of 7mm neoprene and about 5' vis. That was more complicated.
Blue Sparkle