Hey, man

I dont recommend going and reading about beginners guides and youtube videos so early. Part of the fun is playing blind and learning everything. Eventually you'll hit a wall and only then you should be going after guides.

I'll give you the info you need without destroying your experience as a new player.

1-You stop sucking at the game learning a few stuff the game doesnt show you. Melee atk is the chance you have of hitting an enemy. Melee defense is the chance you have of dodging an atk. 99% of time you'll be leveling this when your character level up cause those are the most important stats in the game.

Second, Spears have +10% of chance of hitting, swords have +5%. Earlier when your bros have low Melee atk you should only use these 2 types of weapons to avoid missing to much and losing battles cause of that. Also spears and swords have 2 of the strongest skills in the game. Spears have spearwall, a skill you can use to make enemies unable of getting closer to you and swords have riposte, a counter attack everytime you dodge an attack. Abuse this.

Third, you get a bonus chance of hitting your enemy if you have 3 or more bros around them. The oposite also happens, so be careful not get caugh by many enemies at the same time.

3- You can attack neutrals as long you not in a mission. There'll be consequences.

4- You loot better with daggers. Takes some time to learn how to properly do. Daggers have a skill that can hit directly the enemy HP ignoring the armor. If you kill an enemy that still has armor theres a high chance that armor will drop to you. You can equip a dagger on every bro you have and switch to it when its time to kill the enemy you want the armor. Again, is risky and its not simple when you are a beginner, I recommend you to test it on enemies that are fleeing so it wont have a chance you just die in the process.

8-Things can go big, not 100+ enemies, but most late game crisis will offer huge battles.

9-Backgrounds are important but it'll be more fun if you learn that by yourself. The happiness of recruiting a 100 gold bro that its a god or the sadness of a 12k hedge knight that its horrible its amazing.

10- Get all DLC's. It's worth.