Ah, WhiteCrow! It has been eons. If you wish to see this project through, no doubt you will need to undergo a massive undertaking. Attempting to write an entire cast of characters for those who have long gone by now will be a challenge, but if you have the drive and commitment, it will be an effort worth pursuing.
I myself am in the midst of writing my own works, but as they say, some progress is better than no progress. I find a weekly schedule to update things, either worldbuilding-wise or story-wise, is a good schedule to keep, even if you might find yourself occupied with other life decisions. As always, when you're ready to continue, you may call upon my services to help you in this task.
Cheers,
Op