I was the Reserve DH in Corpus when we accepted three AF members to Navy SELRES. It took anywhere from three to six months to process before starting to drill. The main thing is to go and see the local Navy Reserve Officer Recruiter to get all the paperwork ready so that when you get the DD-214. The paperwork has to go through Navy Forces Command for approval then to PERS (Millington) to get orders cut. Good point of contact would be the Wing Five or Wing Six Reserve OIC. If the rule is still the same you can submit a package for selection four months prior to getting out. Good luck.