Separate Razor for head?

So monitor the blades shapness and just use one razor. Great, will consider it.
You could also consider different blades for head and face. I think the razor angle and application is important so using the same razor should be beneficial in learning good technique. Finding blades you are happy with is part of the journey to good technique so try a few blades; anything from PPI (St Petersburg) is a good place to start. I like Gillette Silver Blue and Astra SP but the Gillette 7 O'Clock SharpEdge and Polsilver SI are well liked. By the way, I don't head shave. Welcome to TSR.