My advice would be to consider not buying these irons, even if they are cheap; different irons have different designs and characteristics therefore no one set of clubs will suit all players, and this is more pertinent if you're new to golf.  It's really worth going to a good golf centre/shop that does fitting, preferably dynamic and not static fitting.  The latter only takes into account your body type/size and makes no allowance for your swing, whereas dynamic fitting uses laser/camera technology to measure all aspects of your swing such as: attack angle, speed, face position at impact, launch angle etc. and, armed with this information, your Pro should be able to provide  you with a set of clubs that match your swing and will improve your game.  Fitted clubs do not need to be expensive and the fitting process is normally at no extra charge, but you much happier with the results.