As an experienced North woman, I think, I will use this thread to encourage and promote the North mod! I can assure you; it's really worth a try!
The new version 4 is better than ever. You can almost say; it's a new game. So, be bold! Forget about the truths and tricks you've learned by playing Banished and get into a new adventure up North!
This might be a spoiler for some, who likes to discover things themselves, but I will give you some advice for a successful start.
Choice of map and settings
Don't be ashamed, even if you're an experienced player, to choose a mild climate. It's easier to learn the gameplay, if you don't have to struggle with bad harvests and freezing people.
I would choose one of the new maps; a small vast forest map or a medium lake map. Choose the start condition you normally prefere.
I wouldn't use too many other mods for the first attempt. It's possible to add a lot of other mods but I would start quite pure.
Open the menu "Actions and removal tools". There are several new icons. Many are very useful, especially at the beginning. Use the small hunter to hunt close reindeer, send your people out in the woods; to collect firewood in winter and wild food in summer (grows only in summer), use the small fisher and woodchopper.
Prepare early for tool production. It's a more complicated production chain. Iron ore -> iron bloom -> iron -> iron tools, every step needs charcoal and if you want steeltools, there's one more step.
Choose the right crops. Not everything will grow. You have potatoes from the start on every level except impossible. That's the best growing vegetable, cabbage and beans work as well. Apples are the best fruit. Cherries, plums and pears will work, too. Don't try anything else, if you want a good harvest. You might get some wheat in a mild climate but never a good harvest. Always be well ahead planting new orchards. They take longer to grow in this climate. (Note; this is only true, if no values from the crops are changed from the latest version)
If you play on "harsh" you have to start the harvest manually, on "fair" I recommend it but on "mild", it works also without a manual start.
Here you really have to forget everything from vanilla Bansihed.
There are partly new merchants, who arrive more often.
The prices are very much changed. Don't think you can put 100 firewood in the port and buy 400 apples. No way! If you order apples, I think you'll need 400 firewood for 100 apples.
The merchants want to live on their trade. The prices at the port are what things cost, if you want to buy. You will get less, if you sell them for other goods. You might get the selling price, if you wait for the right merchant; one of the export merchants, who brings coins. But no export merchant pays a higher price for everything, just for the things he/she wants!
Coins are introduced. You'll need them to buy animals and seeds. You can use them, to get the the best price for your goods.
There's no "best trading good", like firewood in vanilla Banished. You can sell a lot of different things. At the beginning my main export goods are logs and venison, later in the game; steel tools, clothes and beer. But I also sell other things, I have a surplus of; herbs, mushrooms, salmon, charcoal, mutton, reindeer furs..... if I play on mild, I would concider apples. Take your pick!
What make sense to buy? Barley, enough bricks and rooftiles to build a brickmaker, sheep, potato- and apple seeds (if you don't have them from start). In my present game, I also buy vegetables, wool, clay, and some iron ore.
Good luck out in the Nordic wilderness!!