See thats how I felt for a while but I tried the old IL2 Demo (which is a very small and old taste) and I got hooked.
The "complexity" takes a while to get into but its ultimately not all that complex and its really quite

of fun. I love the game...fly all the time. The physics are more or less real and its very accessible. Its definately not an arcade game however and apparently the landings on carrier decks is about as accurate as has ever been done. I screwed up the first 10 or so...now I can bring most planes down.
Seriously, to get started you need to know the following general controls:
- Guns 1
- Guns 2
- Rockets
- Bombs
- Landing Gear
- Flaps toggle
- Radiator toggle
And if you're flying from a carrier then add:
- Release chocks
- Tail Hook
Everything else is in the details. Some aircraft are very automated (like the Spitfire and FW190)...while others are more manual. Some need adjustments to fuel mix, supercharger stages, toggling WEP (emergency power)...and some pilots really get a kick out of using the manual prop pitch on the Bf.109 (instead of the auto) which I have only ever destroyed the engine on.
There's a learning curve but its not a brutal one. Its not like Lock On Modern Air Combat which takes quite a bit more to master judging by the demo(s). Something like fuel mix seems kind of complicated but I learned it maybe 6 months after buying the game...its pretty simple too: if there's black smoke pouring from your engines at higher altitude for no apparent reason...reduce the mix.
Don't be scared off because it sounds complex. The hardest part is "flying" or getting used to flying. As space combat simmers, this takes an adjustment but you already know joysticks so its not a big deal. Once again, I recommend the full install...Pacific Fighters on its own is sort of incomplete and sparse in comparison.