This weakaura will show each of your abilities that need to be kept on cooldown. They disappear as you keep them on cooldown. Just play whack-a-mole and have fantastic threat.
This is not an optimal rotation, but you can certainly just press abilities as they read left-to-right for a good-enough rotation.
This weakaura helps build muscle memory with your keybinds, reminds you to keep buffs up + things on cooldown, and can help you hone in on your optimal rotation.
For a more optimal rotation, google 'prot paladin wotlk 9-6 rotation'
You can set Keybind labels by going to /wa > Fundido's Protection Paladin Coach > Custom Options tab > filling out your keybinds for each ability.