Good idea
You'll need to work on graphics and playablility, remeber, the suggested size for a map is 800 x 600 pixels, your's is prolly 'bout four times that.
I'm not sure what program you're using, would paint be correct? I would suggest using a different (better, more powerful) program. I prefer photoshop, but there are several others listed at
http://www.conquerclub.com/forum/viewtopic.php?t=1410.
The Front Line is a good idea for non-passable borders, but you'll also want to use moutains and rivers, unless you extend the Front Line.
Good luck and keep up the work!