Hey there, Patagonic! Welcome to the "sewers of Editing" as one of our regulars keeps calling our fine site
The capabilities of the editor and the engine are indeed nigh-limitless, as you'll find out, but that does also mean you have a lot of things to learn yet!
Regarding the tutorial, you should try OFPEC's
Beginner's Tutorial: you will also find a section under "Adding complexity" that treats triggers. A good read!
Regarding the landing thing: helicopters and controlling them has -always- been a big hurdle to overcome when it comes to both ArmA and OFP (predecessor to ArmA) editing; they buggers just never want to do what you tell them. A good place to start when it comes to this is the
land command. If you try giving the helicopter a simple Move waypoint, and in the on activation line write something like:
this land "get in"
The helicopter should head to the waypoint, and then land, hovering slightly above ground with his engine on. As to how to make him hold there for 2 minutes exactly, well...that's a slightly harder nut to crack: you could try having a second waypoint right after the first, that has a timeout of 120 seconds or so (the values in the timeout/countdown sections are always in seconds), and then continue with your waypoints after that. With any luck, the chopper will remain in its "get in" position until the timout is finished.
Alternatively, if you have certain units that need to get in, just synchronize (F6 - drag a line) their Get In waypoint with the choppers Load waypoint, and they should do everything quite automatically.
As mentioned though: choppers aren't the easiest beasts to control, so don't lose hope!
Wolfrug out.