In Texas, the membership is valid for a year from enrollment. Not sure about other states. So even if you joined let’s say today and do not take delivery before January 2, the membership is still active and a 2024 certificate can be generated. Again, I’m not sure if that applies to all states.
If it were me, I would remove all that except the spray in bedliner. Yours is an ecoboost and that is in your favor of getting built. With less add ons, it may very well help your chances of getting scheduled.