In my honest opinion, you should not create profile if you do not have your ECA report. The reason being is that you need to enter ECA reference number and completion date. Now, your completion date will obviously will be in advance and EE system will not allow you to select future date and reference number will be slightly different than the one in your account now.
If you enter fake completion date just so that you cn enter the pool and if you get ITA, I believe your EE profile information get locked and you will be assess and verified based on the info you provided in ur EE profile. If CIC findout that the completion date is unmatched then it is categorised as misrepresentation. You know what the consequence of misrepresentation,right? (5 year ban from applying a visa to Canada)
So, I suggest you be patient and wait until you get your electronic ECA report.
(Sorry, I didn't comment on your NOC bwcause it's your decision. Yiur job title doesn't matter. What matter is your duties. Your duties listed in your reference letter should match atleast 70-80% with the NOC leading statement and all main duties. So, yiu have to research and comoare it yourself).
Goodluck