Edited 26/8/15: It appears that to get access to all 10 sets of drills,you need to play this section on Rookie difficulty,otherwise the 1st Basics tutorial won't show & you need that & the 9 main sets of drills to get the achievement.Thanks to GIO42 for his comment below.
On the main menu you'll find the Gatorade Skills Trainer & upon opening that you'll find 1 basic tutorial & then 9 different skill types going from simple running/passing to more advanced set-plays & pre-play options.Almost all of these different skill types have upto 10 drills included in them (1 has 15 drills),& each of these drills has a tutorial.You do NOT need to do each tutorial to get the achievement,just the drills.I personally not knowing anything about American Football or previous Madden games,did do the majority of the tutorials too & all in all this achievement took me a good 6-7 hrs to complete.
Each Skill type has a %age completion & a count of drills complete shown on the tabs in the Gatorade Skill trainer menu making it super easy to see how many drills you have left to do in each section.Once you get all of them up to 100% the achievement should pop.You do NOT need to do the 'Gauntlet' section,that has it's own seperate achievement.
I hope this helps,if I can improve on this solution PLEASE LET ME KNOW IN THE COMMENTS before giving me a thumbs down.