Could any one help me on this RTS problem.

Hello, I am creating a RTS game. I am shooting for kinda like clash of clans but only the style not another CoC.
Well any ways. I am trying to figure out how I should do game mode. I was thinking of doing a check system to see if player has base witch for right now the value will always be no. After that should I spawn a new scene? with the map and character and town hall?“Not actually called town hall just for a example” and give starter resources? or should I do it where I spawn in the scene. This is my first project. also is there a good Hud tutorial series. If you can help at all it would be amazing. Thanks for your time!