I think we've all thought that at one time or another. These guys are really good when it comes to beginners; their critiques and willingness to share their technical ability is astounding, and they absolutely refuse to let you leave with an ugly map. All you have to do is be willing to listen and follow advise.
As for the map, you can find the whole map of the Witchlight Strand
here. Briar's Cove is just northeast of the center of the map.
I envisioned this area as more of a region than a city, meaning there would be multiple cities within the region. You can start with one city and work out, or with the region as a whole and work inward... or whatever you want, really. With there being multiple cities in the area, it'll give you plenty of room for practice so you can work out your techniques and whatnot; they definitely don't all have to be in the same style.
If you do decide to take on this city, or whatever city, you should start a new thread titled
[Region 1][Map 25][Location 2] - Briar's Cove (obviously you'll need to call it something else if you use a different city, but use this format). I'm happy to work out details with you there.
I've attached a small image of the Briar's Cove region. This area is right at 100 miles square and gives you plenty of room to work with. You'll obviously want something much bigger in the end, but this should give you something to start with.
Hope that helps!