So you weren't working out yet?
In that case you won't have to reduce your intake at all.
Infact, how about you grow some muscle for 6 months or a year and THEN see if you need to do any cutting?
Start working out, get your diet in order, UP your intake!
There's just not much point in starting to workout and cut at the same time. Both goals are getting in the way of each other.
As you're not some behemoth with 50% fat you'll find it much more encouraging to put on muscle and strength as you start out and without muscle you won't know where you stand fat%-wise anyway.
Patience.
Learn to squat and deadlift properly. Read about it as much as you can.
You're young with a good set of lungs so you've got what it takes to become a very strong individual and stay that way for a very long time.
Goodluck.