I cringed when I saw all those Merkur blades...

Merkur makes wonderful razors. My personal user is a Merkur Futur. But you can pass on their blades; they are universally regarded as inferior to almost any other offering (even ones costing a fraction of what they cost). If I were you, I would just get rid of them; no joke.
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You didn't mention your experience level, but if you are a beginner (or near beginner), I highly, highly recommend that you choose one blade and stick with it for a month or two, at least. That way, you can focus on your technique. In my opinion, the single biggest mistake that new wet-shavers make is buying a bunch of different razors, blades, creams, soaps, after-shaves, etc., and then trying a million different combinations in the hopes of getting a perfect shave. NO!

It is most important at the beginning stage of the wet-shaving journey to stick to one product (make sure it's a quality product, obviously) and hone the technique down: beard prep, lathering, shaving. Once you know your face and beard and know what areas of your beard are the "problem areas" (sensitivity, proneness to nicks, difficulty to shave close, etc.), and once you can get a BBS shave, only then do you branch out into new products.