Terrain Showcase

I have always liked making very detailed maps, especially in the WC3 editor. But I could never figure out triggers (I could also never find any online tutorials). This map is an showcase of the terrain work and details I am good at doing. I was wondering if I could get some basic instructions on triggers to go things like:

• Make units start mining automatically at the start of the game
• Make units patrol automatically at the start of the game
• Make units get in bunkers automatically at the start of the game
• Have upgrades already researched
  I guess this could also be like my portfolio if anyone needed help making their map look pretty.