Hi Goth,
There's a Single Player 'Challenge Campaign' which basically pits your airmanship with the Pony with flight courses, bombing, strafing and dogfighting skills tests; whilst not a historically based campaign it is diverting if not fun but can be bloody frustrating! A series of 'Instant Action' missions are also available plus a variety of downloadable user created missions and some great multi-player servers dedicated to P-51/Fw-190 action, Dogs of War (DoW) coming instantly to mind.
Be warned though; any skillz you had in Il-2 do not automatically translate across and you'll have plenty of new habits to learn and some old bad habits to try and un-do!
No other flight sim has kept me so absorbed and interested in just flying the damn airplane; for that alone it is worth every penny.