From the beginning. You will have to establish your own settlement starting with the first building. All you have is a couple of peasants and a valiant feudal lord with land rights.
No battles for the kingdom, no fates of empires. You're just a petty feudal lord whose task above all else is to survive in the most dangerous medieval setting.
Equipment matters. Creating decent gear is a historically challenging task for any blacksmith. You'll need a significant amount of resources, time, and skill to make a truly reliable armor.
Resource Management. Building the economy of the settlement is almost a key strategic task. You will have to show tactics and wit to correctly distribute the balance between food, gold and army. Those who think only of economic prosperity will be looted and killed.
There is no diplomacy without diplomacy. Do not anger the king, cooperate with other feudal lords, trade! Temporary lawlessness can and will cost you your life!
Talents system. Each peasant, in addition to the ability to pump his skills - also has a talent in one particular business. By defining the talents of your subjects - you will be able to dominate in any field.
Strategy. You can gradually buy animals on the farm, or you can risk to go hunting for a bear skin. Each option can have a chance of success - it's up to you to choose which way to go!