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I forgot to mention that I got a shavette too. But, with it you can only go up and down and my whiskers grow sideways a lot, so I can't get a nice shave.
A shavette is just a straight razor with a replaceable blade. It is easy to use such razors to shave top to bottom. While a bit more challenging, it is quite possible to use a straight razor or shavette to shave bottom to top or even from ear to chin. You just have to modify your grip on the razor. It also helps if you can shave with both hands.
When shaving top to bottom, I hold the razor normally and shave the right side of my face with the right hand and the left side of my face with the left hand. When shaving bottom to top or ear to chin, I simply reverse my grip on the razor and then shave the right side of my face with my left hand and the left side of my face with my right hand. It will take a bit of practice to learn how to do this, but it it certainly doable for many people unless you have minimal control of your non-dominant hand.