What was your first castle in Heroes 3?

I played the "Blood of the Dragon" campaign in Armageddon's Blade for the first time. I was surprised by everything, as I hadn't played any games of this type before. However, I was disappointed that in the beginning, after 3 weeks, an enemy hero with a huge army attacked me, and I had nothing. At that time, I didn't know that I needed to hurry and start building, but instead, I wandered leisurely through the dungeon, wasting time on each group of monsters.