Hi! These maps which you are trying to host are ranked, which means that they are following points.

Firstly, let you and your friend add each other with function /f add (nickname)

After that join some room together for example /j romania

Then is neccesary to learn about custom maps.

type /chost list, it should be 3 pages, find what you want and host with command for example "/chost dota83 GO"

Without counting games or ladder, you will be able to start match with only 1,2 players.

Let me know if you need any other info