Hi there!
Breastfed babies feeding needs are quite different to formula fed and views and knowledge have changed considerably since Tracey’s books were written so don’t worry about sticking exactly to the timings of the EASy.
Breast milk is digested a lot quicker than formula which is why most babies don’t make it to 3 hours at the ages suggested, so feeding sooner is totally fine and expected. What we do find is that formula fed babies are able often able to go longer than 3 hours sooner than expected which also has issues as their A times then need to catch up with those E times....
If your LO hasn’t had a bottle yet be prepared for him not to like it as bottle teats are very different to you, there are bottle types that mimic more natural shapes which may influence your choice of bottle. Formula also tastes very different so that may be rejected too. That said he may take to it like a duck to water.
I would just offer 3 or 4oz for the first feed and see how it goes, you can buy ready made for small feeds so it may be worth dong that in the short term rather than buying a full pack and wasting it. If you aren’t already doing a dream feed try it for a week or so to see how he takes to it. Neither of mine would take a dreamfeed so we just let them wake when they were hungry and got them back to sleep ASAP.
No experience with swapping from breast to formula I’m afraid as both mine were only bottle fed but I think gradually is best. I know some have swapped by replacing one feed a day for a few days then building up but that can have an impact on supply for other feeds. Maybe post on the breast feeding board as I may not be right!
HTH
Laura