Hi there, Hopefully I can help with some of your questions. I too started EASY when dd1 was a bit older, and now have a nearly 6wk old that we are trying to implement it with. I think at this young age you can just be very 'loose' with the EASY - as long as you aren't feeding to sleep, which you aren't, you're starting off on the right foot. Now, my dd is bf, so I'm not sure if it's different if you're formula feeding, but I am aiming to feed her every 3hrs during the day. Maybe with your ds you could aim for every 4hrs. This means waking them from a nap sometimes. In the evenings Tracy suggests every two hours for a couple of feeds to 'tank them up'. I have not had success with a dream feed yet, so I let her sleep as long as she likes once she's gone to bed. At this age I don't think you need to worry about set times for feeds, but at some stage I plan on waking dd up at 7am every day so that the feeds start to happen around the same time every day.
I am not sure yet about tired signs (apart from the obvious yawns, but they seem to happen too late), so aim to have dd back in bed by 1hr after waking.
I have also found dd likes a dummy, and we also rock the basinet at times (at night only now, when I don't use the dummy).
I think that's about all - hopefully someone else can add more! Good luck!