Sound advice.
What I do is find a clip with something sticking up into the sky - a twig with leaves, TV aerial or similar because it is easier to see sharpening artifacts, set both sliders to minimum and increase Amount until it begins to take effect, then increase Size slowly until it begins to spoil the sharpening and back it off a bit. Check it on something with lots of detail, like a leafy bush in the middle distance. Enable and disable Sharpen and if it looks as if the leaves are chromium plated with it enabled, the setting is too high. The main thing is, apply the minimum of sharpening. My current settings are Amount 60.0%, Size 3.0%.