Welcome to the forum.
One thing you could do which doesn’t require a lot of experience is to check all the screws in the electrical panel to see if they are tight.
First, unplug the rv at the power source before you do anything.
Disconnect the negative cable on your battery. This needs to be done if you have a INverter.
Next remove the cover on the breaker panel which will expose all the wiring and the circuit breakers.
Next check the screws holding the wiring to each breaker.
Then reinstall the panel cover.
Reconnect the battery cable.
Now plug in the power cord for the rv and try resetting the GFCI.
Now if you didn’t find any loose screws, I would contact a electrician.