To fly students at TRAWING5 you'll need to be current on the T-34C, or have orders to the FITU for some abbreviated re-currency training if you were a previous instructor. Even the abbreviated syllabus can take 2-3 months. First time through can take 4-6 months. Reserve billets are currently available, but word is that by this fall they will start becoming very competitive for selection again as most the billets will be filled with few senior retirements upcoming. Don't know your background or what kind of connections up the chain of command you might have to help you out. But unless you are affiliated with the WING or a reservist you can't really just pick up a flight...