your GC only needs to say " I wish to carry a concealed weapon for self defense"
in sac county its around 400$-450$ when its all said and done. It just depends on who you take your qualifications with.
Sac county is very lenient with permits these days. Even though your only 21 if you have a no criminal record or a very weak record with time between the "incident" and now say 5 years you should be good to go.
good luck OP
Also go to sacsheriff and go to the ccw section and check the "online appointment system" hourly if you REALLY want an appointment anytime soon. Its booked 6 months out last I heard but if you check often you might get lucky like I did and grab an appointment