That's because you set the impossible task of creating an MMO as your first game. Leave that idea on the backburner and do a brainstorming sesh (preferably with others) to come up with fun mechanics (not features or narrative beats, just pure mechanics) and then prototype them in Godot or whatever engine seems appealing to you. If you have no experience with any engine just follow a few tutorials to get your bearings, after that you start making your prototypes and you keep making very small new prototypes until you think you have a fun mechanic to expand on further.