I was diagnosed just before Christmas - not a problem, we don’t do the 40 people event, but just before my biggest event (event organiser) of the year! We worked around it! As you haven’t got details of treatment and as it’s hard to know ahead of time how you will react, it’s a plan A and B scenario. Your surgeon can answer some questions but others will require an oncologist.
Sons will graduate and you will do what you can. Weddings and anniversaries are likely to go ahead too. But a road trip, however desired, might be put in the maybe later category. It may end up being a great end of treatment celebration, but if you don’t need to commit to it now, it might be in the tbc category - only as to timing.
Things to ask include optimum timing for treatment - how soon, how long, what order. I found a list of possible treatment side effects useful for reference, but remember you won’t get them all and might get almost none. What treatments require hospital, or day oncology, what will be pills you can take anywhere?
It will take some time to get all the information you want, so be as patient as possible. You are on the road to recovery , that’s the main thing. Best wishes.