1.Get a flight simulator, that has a Mustang on it. Try to take off, fly it and land in one piece. Whenyou crash, no big deal.
2.Get an instructor.
3. have him check it out and do a maiden flight for you.
4. have him teach you to fly using a buddy box.

Keep in mind this is a warbird not a sunday flyer.
They are not very stable, fly and land at higher speeds due to wing loading.
They are easy to stall and put in to a spin. Been there done that... lol
In my opinion, with a good instructor you can learn to fly on any airplane that is set up properly and flys well.

Don't try to fly it on your own unless you really want to carry it over to the nearest bin.

Good luck