Well firstly it's nice to see something from someone new in the mapping world.

Here's my screenies and finalsun quick review:
-Layout idea is nice
-flooded with cliff errors though. Are you using Marble Madness? or do you just need some help with it?
-detail level is actually quite nice
-based on screenies the lighting is a bit too dark over all.
-tib field lighting is too intense IMO though not too bad. I'm gonna assume you didn't edit the light post.
-also remember to only place light posts in tib fields which are permanent. you wouldn't want light emitting from nothing except for ground would you?
-its a little flat. I think you could have used more small hilly slope areas.
-cliff work, to the exception of the many cliff errors, is decent for a beginner.
Overall it is a decent map to start out with. Fix those cliff errors and it will be a lot better.
My suggestions for future mapping practice for you:
-get used to using marble madness if you don't use it already.
-use cliff ramps and make several height variances throughout the map.
-mess around with the lighting a lot. There are quite a bit of options with the lighting really.
-Practice use of light posts
-Keep in mind that the blue line represents the visible area of the map and that it needs to be above the white of all the spots on the bottom of the map and inside of the red on all the other sides. To change the place in which the blue line is at go to EDIT -> Map and then where it gives you 4 values in a box edit the last one and make it smaller until the blue line is above the white at the tallest area of the bottom of the map.
anyways good job. I hope you fix the cliff errors. If you need help with that then I am sure I or a fellow experienced mapper can lead you through the process of what you need to do.
Anyways I hope you keep making maps and keep practicing. I am sure if you do enough you will get quite good.
(wow that became a lot longer than originally planned lol)