I always make a list of what I'm cooking and how long it's going to take and then write a sort of timetable counting back from the rough time I want lunch to be ready. (Aim earlier than you would like, as it always takes longer). You can write it digitally so that you can move things around as you find amendments or just do it on paper then write it up again in a more legible format.
I recommend writing both timings like 10:35, but also T-1h25 mins - if you get off track, it's easier to convert to the new time using the T- bit than the clock time bit.
Remember to factor in time for things like taking items in and out of the oven and basting etc. The first year I did this I forgot to build in buffer time and got really stressed.
While doing this plan, you can also go through your cupboards and allocate which dishes will be used to cook each item. Then you can check what actually fits in the oven at the same time.
The meat is usually the biggest dish and can be left to rest for 10-15 mins while you finish off or warm up other things in the oven. Vegetables seem to lose heat the fastest so you don't want them sitting around for long. Anything small will get a boost of heat from the gravy, as long as it's not stone cold.
Air fryer is basically a mini oven and will cook things faster. You will probably find air fryer versions of any Christmas recipe online. Check if your dishes will fit in the air fryer, and that you can get them out when hot, if you are not cooking things directly in the basket.
I know this all sounds crazily organised, but I have ADHD with quite bad time blindness and I really struggle with coordinating multiple tasks to make them all culminate within a reasonable amount of time to each other. This works!! And you can take advantage of any gaps to e.g. serve the starter so that you're not missing everything stuck in the kitchen.
You'll also get a sense from making your timed plan which items can be done much further in advance e.g. the day before. For example, most chopping, peeling etc. Some assembling. Potatoes will go black (doesn't affect taste, but looks bad) if you peel and chop them early unless you keep them in a bowl of cold water. Sprouts, carrots, parsnips etc all fine to pre-prep.