Ohhh, it is teh sux0rz d00d !
Kidding. But you need to download something called 'Polyworks', it's an alternative map maker. No viruses or anything, but it makes life much easier with a feature called 'grid'. It looks like you tried to make your map free hand, which is a bit brave, though quite silly seeing as you've just started mapping. Download it, don't use scenery, and plan ahead ! Not planning is what gets many people in trouble with their maps, heck, ask Kamikaze Duck (a great mapper around here). The first thing he does with a map is sketch it !