lol - level 10? You're going to have trouble!
The lowest level for tin on the alliance side would probably be Westfall, but that's probably around level 15 for where you need to mine. There are also a few spawns in Darkshore that might be a little easier to get to, especially if you have stealth. Best bet though would be to level up some, then hit Loch Modan - much denser on the ground there.
Your best bet would probably be to type "tin" in the search box on the left, click on "tin vein" on the next page, and it will give you maps of the tin veins in each area where it can be found. Pick an area you're comfortable in, and use the maps to help you find the veins in that area.
Edited, Wed Mar 15 09:41:39 2006 by fledarmus