This may be a better question for the EASY board, but here goes...
I think with a 5 week old, the best way to start the EASY (which sounds like you have already done) is to get on a regular (3 hour) feeding schedule. Then, be sure that you are doing the pattern of EASY so she is not being fed to sleep, etc. She may not have a very long A time at this point, but start to get a feel of how long she can handle and start a good wind down routine and bedtime routine so she knows nights from days. I think the suggested feed times for that age are 7,10,1,4,6+8 (cluster feeds) and dream feed at 10-11. With A and S in between. I think the "when to wake them up?" is just based on when the next feed time is as you feed them just after waking them more than how long they've slept. How long they sleep will really be based on how much A time they can do and they just sleep the rest. Don't let her sleep past feeding time during the day.
As far as when to start your day, they recommend starting your day at the same time, I think. That said, I think at that young age, I let her wake me up all through the night until a reasonable morning time to start the day so I could sleep more and then just started going every 3 hours after that (whatever schedule that put me on 5,8,11 or 6,9,12).
Dreamfeeds (which I haven't done, so I may not be the best to answer this question) is just that-not waking them up officially but trying to get them to eat as a reflex instead of really waking up. I have heard about trying them at different times during their sleep cycle (i.e. waiting 10-20 minutes if they'll not start sucking) but I haven't much helpful advice otherwise. I know there are good postings about this on the breastfeeding board. You can try there.
Good luck!! Be glad you read the book before birth instead of after when you have to do more correcting instead of just starting off right like many of use had to.