I work at a golf course's pro shop and help a lot of people buy their new iron sets. Most people ask me why a player would want the expensive "hard to hit" player's irons. My response is always the same, we want irons with a soft feel (something very tough to describe to someone that has never played with softer clubs), we need clubs we can work the ball with (shorter blade length makes hitting draws and fades much easier) and we think we look cool with them (admit it having a nice set of clubs in your bad makes you look cool). A player that is still struggling with their swing shouldn't worry about how their clubs feel, shouldn't be trying to work the ball left or right (hitting it straight is the ultimate goal) and with a horrible game having a cool looking set doesn't change the fact you have a horrible game.
My suggestion to you is forget long irons, replace a 3 and 4 iron with hybrids, I am a good player and I use my hybrid everywhere from chipping to sand traps. Get cavity back irons but don't get shovels my suggestions would be the Cobra S2s, Titleist AP1s, Taylormade Burners or Callaway Big berthas. The most important thing is the shaft, if you don't get the right shaft for your swing it doesn't matter what head you have the clubs will not work well for you.
If your not great at shafts Ill give you a simple guide
Swing speed- under 80mph look at regular graphite shafts
- 80-90 regular steel shafts
- 90-105 stiff steel shafts
- 105+ x stiff steel shafts
Weight Light=high trajectory Heavy=Low trajectory
Kickpoint Low=high trajectory High= low trajectory
Example your swing speed is 85mph and you need help getting the ball in the air: Cobra S2s with Dynamic Gold SL R300