There are various ways to adjust the RGB settings. You can start with several presets before experimenting more. Click the dropdowns at the Base Effect to apply various presets, including ready "Whole Keyboard Presets." You can adjust their speed, size, and the direction of the wave.
Click on the "Edit" color box to adjust specific colors.
Adjust the Reactive Layer to decide what happens when you press a key.
The AFK Effect has the same settings as the Base Effect, but goes online when you haven't pressed a key for a period of time; adjust the "Show After" dropdown to decide when.
Make sure the "Live Preview" at the bottom is toggled On so you can see your changes live. Click "Save" on the bottom right to finish adjusting.
In the upper left, you can save your configurations; if you need to add more, at the bottom left of the screen there is a button to add more configurations, which save all the keyboard settings you apply.