• You dont expect really much fighting in the early access but some are tough to handle. Still you'll manage to make it somehow.
  
• Try to keep your morale (ML) points to the max as it gave you extra damage and success strike possibility.
  
• How to keep the morale to the max: The will be several extra quests to complete each faction/part of the map you can explore. You might not be able to go back as the story progress so make it worth by spending extra time to complete the quest as it was quite rewarding in term of consumable item and equipment. You can also gain it from battle, of course if you win it.
  
• Explore the map a bit more for extra item gain by the loot box scattered along the story.
  
• How to win a battle smoothly: Use Rourke skill to enhance ally as soon as the battle start, keep balance of your ML point at least 40-50 percent as if drop below, somehow the attack lost it power and evaded by the enemy a lot. Try to use molotov or Lynn pipe bomb skill to flush out 3 or 2 enemy also use molotov if ally was blinded by enemy attack.

If you doing it consistently and try to keep your ML point to the max, defeating the boss in chapter 1 isn't that hard. Don't have much to say here but Im all exited to play the full game too. I'll play a couple time more and perhaps break the guide into quite more describing section later. Goodluck!