War in this game is incredibly expensive. Buying weapons and food early on will drain your starting funds and cripple your growth. Your only goal during your first weeks in the game is to stabilize your economy.
When you complete your starter and daily missions, you will earn XP and level up, granting you valuable Skill Points. Do not put these into combat stats like Attack or Precision. Instead, allocate your early points entirely into economic stats:
Energy: Increases your wage labor capacity.
Production & Entrepreneurship: Directly increases how much money and manual factory output you make daily.