Take a window seat (of course) in a row near the leading edge of the wing. This way you will capture some of the engine and the wing in the picture giving some perspective.
If you get fed up with that after the first legs you can try sitting a bit futher back and catch some of the tailing edge in the frame.
When choosing which side to sit in you could consider the likely take off direction as this will determin what you see as the plane is taxing out and takes of.
With 2 hours or more between flights you should have no problems making it, but make sure you head straigt to security so that it is over and done with.
Put all metal and electronic items in the tray including your belt. Take of your shoes if they ask you to, but otherwise not.
Have your boarding card ready to show at security, at the gate AND to the flight attendant at the top of the stairs when you board.
Enjoy your trip