flyandive

Try SmartCockpit - Airline training guides, Aviation, Operations, Safety for both of you for systems info.

As far as something to push buttons, feelthere, makes a fairly realistic ERJ for Microsoft flight sim. They used to make a CRJ as well but it wasn't that good.

In all honesty though if you are going to an airline's training program you are probably better off studying what they give you when they give it to you.

It might help to play around with some of the buttons, autopilot, etc. but if you actually try and learn anything you will probably learn bad habits or stuff that doesn't really apply to that airline.