I know, my friend. It's not easy to find beta testers and get feedback. Fortunately, I'm in a great community where we support each other, and creating in RPG Maker becomes more exciting. Don't give up; RPG Maker is a nice game engine. Anyway, to disable the menu, go to the third page of the event command and turn off the 'Change Menu Access' command.
You can call up the gold window without needing to enter the menu. In the message box, you need to write the command:
\$
This will open the gold window when the message appears.
With rpg maker you can create a management game with custom GUI and HUD. My game for the jam is made with rpg maker MZ but it is possible to do the same thing with the Mv version. ;)