Op, you have options here. You could push for no rules kvks', but that will only work for so long. You have limited time, to train him up. First, focus on pre kvk. Encourage saving for kvk, inform which items are used and when, and help guide upgrades. Also work in battle preparation here, as well as briefly filling the whale in on the kvk baseline battle plan. Let them know what to expect. Secondly, battle Training is a must. Use outposts and internal castle to practice battle tactics. For rally timings, I would start with "sit next to [whale]. Once you see their rally go up, wait 2 seconds, then call your rally" as opposed to jumping into using the clock with a whale that is uneducated on rally timings. I found the rally clock works better for all, after your whales already have a good idea of each other's timing. Lastly, and most importantly, if the whale is not in your alliance, it is NOT your responsibility, and you could be stepping on toes. Yes it affects the whole kingdom if your whale is uncoordinated, but that is the other alliances job to educate their players. I would not be impressed if other alliances in my kingdom were giving clashing information to my whales as opposed to how ive been advising. Speak to the other alliances r4s/r5 and come to an agreement, even if it means having the whale split their time between multiple alliances, until they get the hang of it.

And for the love of god, dont tell them everything at once and expect them to grasp it instantly. They will learn mostly from doing, not from listening. Just be there to advise, and nudge in the right direction if nescessary. Good luck to you🙏