With the pointiness bake, make sure the color ramp node is plugged into the viewer node, or an emission shader node, the texture node you are baking to is selected in the shader editor and the bake type is set to emission.
I do notice you have rendered shading enabled in the 3d viewport, switch to solid mode and select texture for the color type in the viewport shading properties vis the dropdown arrow. You haven’t yet baked any color information so rendered shading is not going to look as you would think.
