Our professor made up this 'phrase' for remembering the systems... CREM D'RINSE
But that's not the order we learned. We used Elaine N. Marieb's Human Anatomy & Physiology 5th Edition and just followed along chapter by chapter from start to finish. It took us 3 semesters (quarters) or one school year to do all of it. In order:
Cardiovascular (other than blood)
Pregnancy & Development
And for the record I beg to differ about the coloring books. You're excited to get started, and at this point ANY information is more than you've got. So color away girlfriend.
Lots of people have said the coloring books were extremely helpful to them. Personally, the drawings and coloring were my LEAST favorite part of the class, but they felt redundant to me. It's just my learning style.