Steve,
Actually I did a different sequence when building, but considering where you are at now, most of it won't matter. However, before you get too far on the deck, make sure you get your anchor hawser laid through both hawser holes before glueing in the deck. Otherwise, you'll have to try using a needle and hawser line and threading it through.....you can ask how I know this! After that, tie the ends loosely together.
You might want to also paint the interior, the deck and grates before you glue the deck in, again, because it will be easier before than after.
After the main deck goes in, you'll also want to rig the main sheet pieces before the bulkheads and other decks go in. This includes the kevels, eyebolts, and single blocks. Tie off the single block to the eyebolt on both the port and starboard side first. Then tie off one end of about 18" to 20" with tan running rigging line to the kevel and then run it through the block and then out the sheave. Tie them loosely together under the hull for rigging later.
You might also want to rig the various belaying points along the midship rails and the ship's boat, again, because of the close quarters you will working with.
Something else you might want to do when you glue the quarterdeck on is to make sure the mizzenmast goes into the insertion point on the main deck before the glues dries, again, you can ask why I know this!
If you want, PM me with your address and I'll send you a copy of the older 1960's instructions which are far superior than the latter 1970's international pictorial instructions that you are working with now.
Or you can just use this link to download your own copy. Just make sure your virus filters are up to date just in case. You shouldn't have any issues but after working as long as I have in IT, it is always better to be safe than sorry.
I know John already recommended the Anatomy of the Ship book, Susan Constant and Bill Morrison recommended the other books that are very worthwhile if you want to continue the awesome work you have already completed. You can find most if not all in used condition. They are all worth it and it is a great excuse to purchase books!
Steve
http://soubory.radekshipmodels.cz/plany/MayfloverRevell.pdf
Later edit: You will find that the older Revell rigging instructions are fairly good, those guys not only did amazing molds on their sailing ships but also did some decent research for the rigging. Although the larger English Man O' War/Spanish Gallion was researched at one of the Hollywood studio's prop library but that wasn't until the latter 70's again. John has all the great dirt on that from Graham's (?) book on Revell and personal experience when he worked at a local hobby shop.