If you want to fly and shoot only without complications fly the free Su-25T included with the installer. I highly recommend the Su-33 if you are up to carrier operations and its a step towards familiarising yourself with the hornet. If you want basic airmanship under a manual guise, then L-39 is your purchase, also applies to aerobatics if interested.
Lastly, if you want pure airmanship, a trainer, and sightseeing with possibly navigation exercises, its better to await the Yak-52.