It sounds like you're on the right track, but the mine should be the focal point of your entire village. It shouldn't be walled inside a plot, and everyone should be allowed access unless you're doing a coin economy of sorts (which aren't successful. we've tried).
Everyone should be allowed to have an industry alt so they can mine iron (?) and make bars at communal smelters (which can be used for trade with other cities and helps you get more goods that your villagers need into your village). Instead of a miner profession, that person should be a
smither. He would get high quality smithing and such and produce HQ armor that can be used to equip your warriors or be traded, whatever.
Are you putting brick walls around your city? If not, then nothing you do security wise actually matters. It shouldn't be hard to get the wrought (and the steel bars for the gate), especially if you have an iron mine. If you don't have those, then you can just as easily trade for them.... Low quality wrought/steel shouldn't be too hard to buy.
Roads that are 5 tiles wide generally work, though it will make everything kind of crowded. You should shoot for about 7 tile wide roads.
30x30 plots will probably work, but you'll appreciate 35x35 or even 40x40 plots when you get up to a certain point. We personally have 25x25 plots at my city, which worked for a while until I progressed to a certain point. Now I have to take over abandoned plots that are close to me
just to meet my needs.
You should also a tree farmer, and this brings me to another point. Your resources are great because they're close to your city, but that q30 soil won't get you far at all. The q45 water will last you longer, but you will need to somehow get your hands on q50-60+ soil ASAP - whether it be through discovering a new soil spot or trade. The treefarmer/carpenter needs to be able to grow high quality fir trees as well as planting a high quality mulberry tree on the plot for your
seamstress/silk producer. Silk is very important because it can be used as a trade commodity, and you should really produce ranger's cloaks/merchant's robes/ranger's boots, etc. anyway due to their usefulness to more experienced players (which I believe you'll become and appreciate this move that you did early on). A seamstress will need to focus on DEX and Sewing and could be useful for other things as well (Vapntreyius, high quality straw hats for farmers, etc).
Your cook should focus primarily on cheese production and baked goods (excluding plain ol' bread, of course).
Your farmers should constantly up the quality of his crops, and cows and other livestock must be babysat at all times. Do not let them overpopulate! It can be easy to be carried away, and this can turn into a huge mess because you'll have trouble keeping them fed. I find having a few milk producing cows to be optimal per person that chooses to do that. Just feed them decent pumpkins until their trough is full (put the pumpkins in the troughs whole since it saves a LOT of time) and they shouldn't be a hassle for a few days or so. Maybe longer.
Also grass everything inside the city for aesthetic purposes (except the tree farmer's area, which should be claimed and have a fence/palisade/brick wall/whatever around it to prevent rodents and frogs from stunting the trees' growth) and clearcut around the village so that grass can spawn and so that you can see any rams being built.
Anyway, my suggestion was a lot longer than intended.

Best of luck!
EDIT: Censor your image or replace it with a simple drawing done in Paint that shows the layout of your village. Posting the actual map can be dangerous, especially since you'll need to build the brick wall as one of the first things you do at the village, which will leave a portion of the city exposed until the wall is finished. Do not build a palisade around it first before brick because then you'll become lazy (especially your villagers, who might be dumb enough to think a palisade is sufficient) and postpone the brickwall, which will continue to be postponed until your village is heavily raided and everyone is dead.
Consult Avu's defense guide (found in his signature). That's pretty useful as well and might cover some points that I forgot to make.