Use the function keys (F1, F2, etc.) to position your troops. A "Shield Wall" of infantry with archers on a hill behind them is a classic, effective tactic.
Once your Clan Tier is high enough, swear fealty to a King. You can now be awarded fiefs (castles and towns). Mount.&.Blade.II.Bannerlord.v1.0.0.3624-OFME.to...
You cannot conquer Calradia alone. You need a disciplined force and loyal companions. Use the function keys (F1, F2, etc
Focus on Vigor or Control for personal combat, but don't ignore Social (Leadership/Charm) and Intelligence (Steward), as these are vital for managing large armies and fiefs. Use the function keys (F1
Choose a culture that fits your playstyle. For example, Vlandians gain more experience from battles, while Khuzait have cheaper horse archers.
As your Clan Tier increases, your influence in Calradia grows.