There is an english tutorial on Moddb, which you should check out!
Just type in "edain 4.4.1 map Editor", and it should be the first result. There is everything explained that you need to know if you want to make a skirmish map.
A lot of that also has to be done for Mission maps, but I think yours is a normal skirmish, right?
If you still are confused after that, just ask. I'm not very experienced with map-making, especially not for 4.4.1, but I know the basics.