14 months.
If you want to get good at pinpointing the body, defending the body. You can focus on body sparring (but make sure you don’t solely do this or else you will pick up bad habits).
Once you start full body, you can slowly mix in straights, then hooks, then uppercuts and then just all out.
Some trainers will also put on the sparring gloves and go through defensive drills and flat out defense only sessions where they try to penetrate your guard/find openings.
No right or wrong as long as you’re consistent.
Some tips:
-Don’t worry too much about gear (equipment), just be consistent.
-Don’t be the dude that uses his worn out bag/mitt gloves for sparring, grab some decent 16 OZ sparring gloves that you will dedicate to only sparring (I’m still using my Rival entry level ones that I’ve had for yeeears, something like that is more than good enough).
-If you want to invest more in one sparring item, focus on headgear. Headgear that is either too heavy or provides bad visibility will hamper your sparring sessions. I would say headgear first, shoes second.