No harm in making practice tilesets, you dont necisarilly need to use everything you make. Tip for stairs like that: when your editting over a tileset template, make one copy of the stairs that fits right over 3 tiles with some space on the sides, and an exact copy that only takes two tiles. (Minus the blank space on the sides of the stairs your using, they're only 64 pixels wide.)
The building and floor tiles look a little bit too light for the rest. Darken them up a wee bit.
Benches look fine the way they are, don't change them.
Make the tables look a bit more brownish, or if not, just a little bit darker. And raise the contrast on the flower pots.
Lastly, recolor the 'triangular' bushes. As for mapping, if the ground is an autotile, be sure to make use of the shift-technique.
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@arion: Lovely map, I was never to great and making dense forests like that. Also has a nice feel to it, good use of the campfire. My only suggestion: When you use the fire character set for a campfire such as that, lower the opacity a bit.