1. Eve is surprisingly simple to pick up. The controls are relatively easy, and there's starter mission paths for anything and everything you'd want to do, which both train and equip you to follow that path.
2. Eve is as complicated as you make it. I just recently picked the game up at the request of some friends who have been playing a long time. I picked up most of what I needed to know fairly quickly, and there's a huge knowledge base online and players ingame, which are great tools for anything you'd need to know.
3. Eve only has a signle server, which every player plays on. Crazy, huh?
If you want to get started, use this link.
https://secure.eveonline.com/trial/?invc=f50f57ac-9a40-472a-baad-fcea22b1bbf3&action=buddyIt's my buddy invite link, which gives you an extended trial, and, if you subscribe, gives me a PLEX, which can be sold and extends a player's subscription for 30 days. If you use my link and sign up, I'll sell the PLEX and split the profit with you, which should be a nice amount of cash in game to get you going. I'm new-ish, so I'm far from knowing everything in the game, but pm me and I can direct you to some places and give you some basic starting information to get you going.