This is my first straight razor I got and it is kind of like a shavette in the sense that it has replaceable blades but they are specific to the razor and I need blades for it
The gray thing is the blade? Yeah kinda oddball. I suggest get one that takes half of an ordinary DE blade. Cheap and good shaves. Keep the skin stretched tight and the shave angle very low. My favorite shavette is the "Magic Razor" brand that Sallys sells, with Feather DE blades snapped in half. Very good shave. Buy the blades by the 100 online and they are dead cheap. Get two razors, so when you snap a blade in half, you have somewhere to put both halves.