I waited until level 79 before I bought irons - the burners.
I used to get fleeced by my mates with raptures, but the experience pad off later, because I had learnt all the slopes and approaches to the greens when the ball rolls more than it would with good clubs.
At level 79 and Tour Master, with good clubs, I was as good as anyone.
The latest additions of clubs and balls have taken away the need to learn so much , as the long iron shots will stop on a dime. You don't need to know so much where to land the ball.
What u need now is to learn how to putt, on all green speeds.
Strangely I find it pathetic when good players moan about standard, slow or fast green speeds.
Learn them all.
I have learnt championship greens.