From one Dutchie to another, please think very carefully about doing the AOS, you really don’t want to be stuck in the US without being to work or leave for a good few months. You mention that “since you’re Christians you can’t/don’t want to wait any longer”, don’t make huge decisions based on primal desires/needs. I assume that’s what you are referring to?
If possible (not sure how much time you have left on your Esta) why not get married now, leave the US after your visit and do the spousal visa (CR1) instead?