How to create map like Main map dota 2, and custom it

Hi every one, I'm a new guy noobie.

I tried to mod and create a new map like Main map dota 2 with a few of modding. As Level hero begining, respawn time hero death, gold begining, start game like Map dota 2 with action Image 5 hero vs 5 hero, but can start map with alone , or 1/2/3/4/5 players each team, remove creep spawn and conditon win still kill the Main enemy building like origin ver.

I don't know the script, can you show me some idea, if can, best is on hammer with simple tool.