How long does it take to be decent?

[TheJokerIsWild]

I'm wondering how long it will take to be a decent golfer, say a 12-15 handicap. Here is my background:

Have golfed off an on for 5 yrs, but never took lessons and always sucked.

I've been getting lessons (with video) for the past month and hitting balls on the range practically every day.

I have good equipment. Callaway X20 irons, Burner drivers, hybrids, etc.

I'm a pretty good athlete, but I don't believe my body type is ideal for golf (6'4, 200 lbs).

I can shoot about a 97 if I don't cheat and keep score accurately.

My short game and putting are horrible.


I plan on continuting to get lessons and really put the work in so that I can beat my Father In Law soon (he's about a 12 handicap).

When will I be good???