Hi OP, I posted recently about a similar thing - I was trying to do EASY with my 11 week old DD and it was driving me insane. I got lots of good advice from mumsnetters and I'd agree with a lot of what has been said above.
I decided to try it for the same reasons as you - my baby was going crazy in the evenings and was often overtired during the day. However I was so set on doing everything 'properly' that it didn't work - I felt like I was stuck in the house all day and it was ruining my enjoyment of my baby.
Over the past few days I've changed approach; still aiming for a 7pm bedtime and 7am wake time, but am being much more flexible during the day. My baby sometimes follows EASY perfectly, but other times has a feed and goes straight to sleep. I figure as she gets older and her feeds start to space out as wake time increases, then I won't be feeding just before naps all the time (I am terrified of feeding to sleep!).
I moved my baby into a quiet, dark room for naps at ten weeks which has really helped. I spent a few days watching her for sleep cues (for her, first yawn means get her upstairs, second yawn needs to be in the Moses basket, if we get to eye rubbing then she's overtired) and put her down for a nap when I see them. Sometimes she has long naps with no help from me, and sometimes she catnaps and I have to help her back to sleep, or of she won't go to sleep I get her up, and put her back down earlier next time.
The best piece of advice I got was to respond to my individual baby. It's made me much less anxious and she is napping better during the day and going down better at night. Hope things work out for you OP.