I applied & was accepted into the pool. If nothing else, an accepted application is good for 5 years. Apply & give yourself the option. My understanding is you don't teach anything other than JROTC military classes, you shouldn't be teaching calc. That said, there are extracurriculars like field trips to AF bases, retreat ceremonies etc. you may have to lead. As far as the $$ work, I know the schools minimally have to close the gap between your retired pay & what you're currently making (base pay), but beyond that not sure on stipends. Someone else will have to chime in.
Congrats on retirement BTW.