I didn't start from birth but I exclusively bf til two weeks old. Then I expressed and topped up with ebm as my bub was tiring on the boob. I always offered bf first then gave top up of ebm after the bf. This is what my doctors and paediatrician suggested. I expressed after a feed when she was stil bfing. Then I pumped every two-three hours around the clock. I also exclusively pumped til jus t last week and she's just over three months old. It is hard work. Just be prepared to feel like you are always pumping. And you'll be out and about and your boobs will hurt so you will need to pump if you aren't bf bub. This is what I found most annoying.
Can I also add that I've learnt something in the last week about bottles and being similar to bf. the old fashioned slim line bottles with the longer tests ( like pigeon peristaltic teats) are the closest to bfing. (I've been to a speech therapist about my bubs feeding). The shorter teats on closer to nature and Avent bottles are not similar to bfing. So if you want it it be similar go for the older style. Just a suggestion.