As Buddye says, the manual will sort you out on the startup process with keys.
There is a significant change to the terrain coming in the 2.10 release (much higher res textures, totally remade from scratch) so the look and feel changes, but the airfields are no more visible than before. In truth, they were no more than fields and were hard to spot. With familiarity to the terrain you get to know how to get home (for example by following major roads and railway lines, which are all accurately modelled throughout South East England). And of course concrete runways are easier to spot.
Navigation was a huge problem in 1940, as excellent books such as First Light testament. Until you get to know an area, you can get lost so easily.
Having a decent map is invaluable for BoBII flying. Many have downloaded the 1938 maps available from the A2A site. I find them really helpful, personally, for areas of the terrain I know less well.
One other little trick is to use the F5 (Padlock message target) key. This will lock your view to the direction of the last message, or in the case of an airfield controller, the airfield. It makes things a little simpler while you're relearning the geography.
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"Ah yes, Michael (Parkinson)," Bader replied, "But these Fockers were Messerschmitts..."
BDG BoB Developers Group: Six years of passion for historical recreation of the Battle of Britain.