E4d confusion

So here I am going to try e4d method which is heaping successfully...
What I am confused here is..
Take it an example my AF started on 27th(Tuesday) and ended on 1st(Saturday). Should I start the method right on 1st?? And keep going like 5th(Wednesday) again on 9th(Sunday). What is my confusion here is 5th is my first day of fertility window (cycle day 9) and again 9th is my fifth day of my fertility window (cycle day 13) and 10th is my ovulation day.
So if I do this pattern for e4d I ll probably have two attempts in my fertile window, is that ok coz 1 attempt sways best...???
And the second attempt in my fertile days comes one day before O is it ok too??
Which is the best day to do the one attempt in fertility window???
Pls help me out with best suggestions...

Just whatever day after your period ends. I do not want you to try to make your period come out on a certain set of days.

That is not two attempts though. Every 4 days (especially when counted in the every 96 hour pattern as you are) is one attempt. If you have an attempt CD 9, that has NO chance of conception. The CD 13 attempt would be the only viable attempt.

I do want you to understand that e4d is different than one attempt so if you're trying to make them be the same thing, they're not going to be. Two different methods, but both have good results.

Ok I got it. I gotta bd e4d n not worry about my positive opk. Have sex every 4 days after AF till I know I have ovulated...