I played for three in-game weeks, built the capitol and all the creatures, except for the swordsmen. Suggestion: diversify the map, i.e., add enhancing objects (arena, Marletto's Tower, etc.), and place some kind of guard for the resource piles and gold mine. Closer to the garrison, add an outpost with knights (naturally, under strong guard), and add some weak artifacts (Sword of Power, Elemental Belt, etc.). If you don't mind, I can refine the map myself (I have some experience in mapmaking).

Added after 1 hour 33 minutes
Completed it. It's not bad for the first mission. A serious error is that the battle upon entering the smoke doesn't start. I wrote my suggestions for improving the map above.