If you’re looking for something to do over the next couple of weeks then you might want to check out the FFXIV Login event which is going on right now. The event is open to anyone who has previously had a subscription and let it lapse. The account must have been inactive for at least 30 days. Your time during the event won’t be unlimited though, you’ll only get 5 days (120 hours) consecutively to play.
It may not sound like a lot of time, but actually it is enough to complete the entire Shadowbringers campaign and the 5.1 content. It’s a great time to get caught up before 5.2 lands in February if you’re behind and not ready or able to sub up during the holiday season.
The free login event will continue until January 14th, so even if you’re busy from now until New Years you can still get the chance to jump in and play. Though if you want to see the Starlight Celebration in action you will have to log in before December 31st when it ends.
Finally, it should be noted that during the event there will be maintenance done on the servers. You will not be able to log in during those times. Your account also needs to be in good standing. If you have an account with multiple accounts tied to it only the first one you log in will be allowed to take part in the free login event.