I think my tastes are pretty similar to yours, Lorri - I started with a very similar list, but with red Burgundy on it too, and over the past year or two have got more interested in Nebbiolo and Riesling (both so delicious and unique) and have largely abandoned NW (apart from South Africa) and Spain as it’s too much to deal with. Personally I like to have a range of things in the cellar but I also like to have a handle on the site/producer/vintage characteristics of the regions I follow and there’s only so much one can keep up with (and drink!).
I have a cellartracker and have now supplemented it with a spreadsheet that allocates wines in the styles I’m after through their drinking windows so I know where the gaps and pinch points are (e.g. I have too much Nebbiolo to drink in the period 2025-2033 and not enough to drink over the next couple of years).
To draw out a couple of other things alluded to above:
Don’t get too seduced by the latest offers, but also buy mature wines. Unless the current vintage is of excellent quality (e.g. Italy 2016, Germany 2019) or the wine won’t otherwise be available it makes more sense to backfill. It probably makes even more sense when you’re starting out to backfill by the single bottle rather than the case. A big proportion of my buying is done by filtering merchants like TWS, Lay & Wheeler, Seckford and Idealwine to show only single bottles from the 2010 vintage and older. The offers for current vintages will appear in your inbox without you having to hunt for them.
Second, don’t buy too many unexceptional bottles - I have too much village white Burgundy and wish I could hand some of it back for the equivalent money’s worth of 1er cru, for example. Although I don’t always succeed, I read on another thread of this type the recommendation to avoid buying anything that isn’t either something you’d be fine to drink at home without a second thought or something deserving of a special occasion like Christmas or a nerdy wine dinner. A related point is not to get sucked in by special offers - don’t buy anything you wouldn’t have bought anyway, because it will sit there using up storage and then counting towards your weekly alcohol units.
Although it’s not the ideal time to implement this advice, another strong recommendation is to drink as much as you can before you buy - merchants’ walkaround tastings are particularly good for this but there are also wine dinners, wine clubs and (pertinently) online tastings to look at. There’s no substitute for drinking and you can then use your findings as the hook to explore further (e.g. a fantastic 2007 Burgundy I had in 2019 ended up with me organising a couple of dinners on the theme, and trying about 20 different Burgundies from that vintage).