KG,
Well my experience is only 8 days so keep that in mind.

If I were starting over with my current knowledge, I would balance between upgrading Mrkt and Mines, Etc. Currently, I have a lvl 5 Mrkt with 5 caravans gathering resources. But I have a hard time fiding the resources I need most (Iron and Clay) close to my city. I now have over 1 hr commutes each way to the nearest Iron and Clay. So that's a farily long procurement time in my mind. And you will find that others are getting the same resources so you will be interrupted and maybe even have an Army destroy some caravans. So production at home is most important.
You will have to find the balance that works for you. For now, I am trying to concentrate on upping my mines, etc. and using my caravans to help in that process. I think I erred by building a Barracks too soon and trying to get an Army up and running. Any Army a noob can make is just a snack for an established player. Rely on Vault to protect your resources and an invading Army really can't hurt you until sieges come later.
Buildings I probably still should not have but mistakenly built long ago:
Barracks - Needs Spears and Lthr Armor
Tannery - Needs Cows
Common Ground - only need to make Armor for troops
Spearmaker - only need to make spears for troops
Mage Tower - can't cast spells without Books - Which needs Bookbinder and a lot of Tech Rsch
Brewery - No need to make beer for a long time
And if you aren't making the above bldgs, don't research those techs yet.
In the first week, I would only build a Library, Mrkt, Paddock (lvl 1 only), Storehouse, Vault and Consulate (lvl 1 only). Otherwise, stick to upping mines, etc. Get some Caravans, and 1 or 2 Scouts. Up your Storehouse and Vault as needed for your level of accumulated resources.
NEVER LET FOOD GO NEGATIVE FOR VERY LONG. WHEN IT IS RED, YOU NEED TO UP FARMS TO GET TO GREEN AGAIN.
Take some time to research alliances in your general area and see about joining one that fits you.