After getting discharged how long does it take to rejoin the military?

i joined the army reserves back in november but right before i was about to leave for basic i changed my mine so they just gave me a discharge now i want to join the air national guard how long of a waiting period is there for something like that.
Update: i joined the army reserves back in november but right before i was about to leave for basic i changed my mine so they just gave me a honorable discharge now i want to join the air national guard how long of a waiting period is there for something like that.
Update 2: it was honorable discharge
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