you shouldn't be teaching new players item control strategies when
i) new players will and should be focussing on developing basic mechanical skills
ii) the game places minimal importance on health and armour. stack doesnt seem to win people games
the most important things for new players are aiming techniques and appropriate weapon choice
when it comes to new players learning team modes you could make a 2 minute video to show people how to time and set up for quad. as a new player that's pretty much all you need to know
the item control video will give new players the impression that quake champions is about running around the map, timing items to the second, jumping on items and getting frags in between. this is not the kind of strategy you should be teaching new people and especially not in quake champions
in tdm, duel and ffa the object of the game is get the most frags, which you accomplish through doing damage. timing and controlling items forms part of an advanced set of strategies which involve gaining a potential advantage in fights by having a higher stack, which MIGHT let you get more damage and/or get the most frags. But as we know that's not the only way of getting the most frags.