It's overwhelming at first, go under system preferences and click on the screen and then on the color tab and follow the easy instructions to doma software calibration, I do this during the daytime when there is the ambient light in the room. Do the process several times, they suggest that you squint ow step back if having peoblems.
You'll get a lit of flack here but do it today to get to know your computer, you can always select the original profile.
Then look through your instructions for your printer and you should find out how to select the printer profile.
My bottom line has been to calibrate and then pull a print, it's amazing how well this has worked.
With my previous iMac a friend who is nuts crazy about all of this color profile stuff ( and yes it is important) used his Spyder calibrated on my computer and it totally screwed it up, turned everything black and red and then after a long time trying to fix it, it wouldn't even do the iMac calibration and I not only had to completely empty the computer and start over but I lost a tone of stuff on my computer that wasn't backed up.
I will be the only person to suggest this bit it's free, it's easy and when you lean it, you will know more about what to ask for and what you want from it.
I have read endless posts here on POTN about people who spend a lot and then don't like the color they still are getting, so then they are told a bunch of reasons and they deism it and get something else, it's a frustrating thing to study. There are hundreds of experts as well.
From what I have learned, the ColorMunki ( not sure on the spelling) is the best for the i'Mac screen but my printer marches somperfectly right now that I haven't gotten around to getting one and just figure by the time I do, it will have been upgraded a couple
End of rant.