My dd is 22 wks and until last week was ebf
We had tried giving her a bottle of expressed milk at about 7-8 wks as we had a wedding to go to but she just never got the hang of it - just playing with the nipple, pushing it out or letting the milk flow out her mouth.
Got very annoying wasting the breast milk. Anyway we need up taking her to the wedding and gave up until last week when I thought I should give it another go (when I had Christmas party I wanted to go to).
I'd been recommended to just keep offering her the bottle at different times when she was hungry but not screaming. I had been trying to give it to her in the high chair but struggled to get the angle, then on the 3rd day she was in her reclining chair and I gave it to her and she drank 3oz straight away (all I'd put in the bottle). I think because it was easier to get the 45 degree angle.
My h and I kept giving her a bottle a day and I managed to go to the party and he had quality baby time.
We still feed her in the reclining chair since its a new skill, but will obviously try elsewhere soon.
I also just used formula since I'm not very good at expressing and it took the pressure off from wasting the milk.
If I could do it again I would have tried when she was 3 wks old as that's when my friends did and they've had no hassles mixed feeding.
Good luck and try to keep it stress free