Running a Game on Private Server

I am working on a multiplayer online game and am wanting to test it on my own private xampp server before purchases a hosting service.

Problem is that I can not find anything that tells me how to specify a specific IP address and location to look for the server. Am I thinking about it incorrectly or am I completely overlooking a basic thing?

I used Blueprints to put the game together, not sure if that is a helpful bit of info or not :slight_smile:

Thanks!