the precept to believe in mashaich coming has nothing to do with thinking that he is coming today. that would be ridiculous. Imagine if that was the case, that we needed to believe that he was coming today, everyday.
That would mean that for the past 5780 years, everybody had a false belief, daily, in order to be a maimin?
no, that is not the derech, that is not the ikar of the Rambam. The ikkar of the rambam is to AWAIT him every day, and even though he did not yet come, to hope for him every day.
whatever you learned in elementary school, unlearn it.
Whatever you learned in a superficial, mochin dikatnusdika way, relearn in a mochin digadlusdiska way.