Hey ksnumedia, if you have the time I'd suggest to try and play other people map. See how they do their terraining. enemy positioning , triggers etc.
You can learn alot by just playing them and maybe even get fresh ideas on how to do your map.
I agree with Baelethal , if their is one thing I've learn about the editor is the longer you spent time with it the better mapper you'd be.
So you really need not to worry, you'd get better in time.
Anyway, goodluck and have fun with your map making. Hope to see more from you soon.