New irons

I started playing golf two years ago and picked up on it last summer a lot. I’m in Michigan, so I usually play April- September or early October. I'm currently thinking of getting new irons, but I'm not sure if I should hold off and focus on my game more and improve or get a nice set to use for a while and get used to it. thinking of purchasing the following - TaylorMade p790 - TaylorMade Sims 2 - Callaway big Bertha