So I need help

So recently last session me and my players were having fun, anyways it was rounding the end of the session (one important note is that in my world when adventurers commit crimes they are given a certain debt they must work off through quests and adventures, recently our sorcerer racked up a five hundred gold piece debt, long story.) when they met up with some allies to discuss the shadow organization they’re tracking down when they’re informed that a war on their village might be coming, and they came up with the plan to gather allies and attack the main base of the organization, this is exactly what I was hoping for. But then we got to talking after the session, when I jokingly proposed the idea that the next arc of the campaign be that they take quests to pay off the sorcerers debt and meet other adventurers to gather allies to raid the base and then when they do the raid have different groups with different npc companions on different parts of the base, (different groups might group back together or split off, etc but they would each have their own day of the week, so it might be like group A goes on Monday while group B goes on Wednesday, and they both converge on Thursday etc) Again I jokingly proposed this, but I also really love the idea and so do my players the only problem is that I don’t believe I’m experienced enough for this so I figured I’d come to Reddit to get some advice on how to pull this off