Re: it's a real pity MS abandoned Flight Simulator development ...
First of all, having tried both P3D and FSX:Steam Edition, I can say there are very few differences between the two. Also, the makers of FSX:Steam Edition (Dovetail Games) are planning to release a new version towards the end of this year, which is claimed to be a vast improvement over the current version.
but back on topic - I've used FS for about 15 years, and a few years ago I had a go in a real life BA training simulator, flying a BA 777-200. Landing was surprisingly easy if you know what you are doing.
Most modern aircraft are fly-by-wire, so there is no need to work the rudder to balance out your turns, just turn the yoke and the computer does the rest. The only time you need the foot pedals is when you're on the ground. The foot pedals provide two functions - press the whole pedals to activate the rudder, and press the tips down to activate the brakes.
One interesting thing to note though - aircraft have differential breaks, so each are activated separately. This poses a problem for most people who hold a driving license - you become sub-consciously used to slamming your left foot to the floor quickly, while pressing your right foot slowly. In a plane, this has the result of throwing you off the side of the runway due to the differential breaking.
So watch out for that one if you ever do have to take control of a plane :)