We're glad you are here with us.
Can you clarify your make and model?
Maybe even post a photograph or two. I
Using an adapter to go from 30 amps to 15 or 20 amps will work, but there are significant limitations to bottle-necking the power feed like this. The lack of power at this point could be a result of several things.
dwightdi's suggestion is a good route for you, or invite a very knowledgable RV friend over for burgers and beer.