I don't think there's anything stupid about what you don't know. One of the hard things about cancer is that, unless you've experienced some other major medical issue beforehand, you're basically being introduced to the medical world at a time when you're in crisis. There's a lot to learn and you may not be at your best (chemo brain and what have you). I know I've had plenty of experiences with my Dad where I think, "damn, if I knew then what I know now." But that's part of the journey, you learn as you go. It sucks because you feel like you could have done better, but it's also a good thing in the sense that each day you're getting a little more able, acquiring new tools, that will help you along the way.
A lot of the people who are more knowledgeable about their cancer have been on their cancer journey for a longer period of time (or found this board or some other resource early on and started asking questions). So don't beat yourself up about what you don't know. You're in the majority. And really, there's nothing wrong with that. Some people do better knowing less. It's a personal choice, no right or wrong. If you want to know more, it's there for you.
As to your questions, I don't think anyone here can give you a good answer. I'd follow up with your doc to verify staging and to discuss the pros and cons of delaying treatment for holiday travel. I've seen that question be answered both ways and it seems to be fairly patient specific so it depends on your unique circumstances. People hear can tell you what they've done, but that's unique to their cancer and their journey.
Daughter of Dad with Stage IV CC