Are all EC grads super-smart? YES!!! Smart in the following ways; self-motivated, disciplined, obsessive, emotional intelligence (Know your capabilities and limitations) organized, unable to accept "no" for an answer, as in "no, you aren't capable of ...."
I suggest that you practice as LPN in sub-acute care, you will learn all the clinical skills that you need to pass CPNE; assessment, documentation, clinical skills such as tube feeds, foley caths, wound tx, med passing, IM, IV meds, sub-q meds, running a code, time mgmt. Consider this as paid nursing school clinicals.
For me, the most important piece of time mgmt for exam study time was a dedicated room in my house with all of my books, study materials, laptop, etc. This worked for me because I could grab study time while multi-tasking, cooking, laundry, monitoring kid's homework, etc. I turned my once lovely dining room into a study hall/lab complete with dummy to practice on, IV's hanging from chandelier, hutch converted to med closet, you get the idea.
BTW, EC is not "ONLINE" it is the same content of brick and mortar schools. I have a friend who did traditional RN while I did EC and we were assigned same content, textbooks, But I did not have to waste 2-3 hours a day in traffic or work for free doing "clinicals".
EC worked for me, middle-aged, mom, but I could not have done it without the support of the allnurses.com crew.