Cass
Congratulations on getting your partner out and observing with you!!
Firstly, have you tried the 10mm eyepiece? Also what is the focal length and aperture of your scope?
One way to check if your scope can come to focus is to check stars. The moon at high power can just look a blank nearly featureless blur unless you are looking at the terminator (the area where the lit part and the shadow part of the moon meet) where there is more contrast. Stars on the other hand are simple points so pick a star rich area and try to see if you can get focus with those other eyepieces.
Cheers
Malcolm
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