Scripts

Hello everyone! I'm a beginner mapmaker. I want to create my own campaign, but I'm facing some HUGE difficulties. I don't know any scripts except for PlayObjectAnimation, and even that one doesn't work for me. I need scripts for battles between creatures on the world map, for triggering events when a hero approaches them, for displaying pop-up messages, and for mission objectives: the main hero must survive, kill all Knight units on the map, save all Orc slaves, burn down all villages, and capture a city. Also, I'm interested in how to place spell animations on the world map. Thank you in advance.

Added after 16 hours and 45 minutes
Will anyone help me?