Hello Rob,
Ill tell you that your first tank kicks tha crap out of my first 6 or 7 builds!!! What Matt said are all valid points, but this is your first and a fine tank it is. You can take this one to another level or just learn from it and the next will be better and so on. You may also have limited materials for details like washes etc.
There are tons of info, references and tutorials around not to mention tons of gentlemen here who will answer any questions you may have on any matters concerning armor building, painting, weathering and the like - so dont be affraid to ask. Keep on building Rob and we cant wait to see the next tank!
Gary