Shoulder surgery

Need some advice! I go for shoulder surgery next month ( can’t push it back any longer ) my LO will be just over 15 weeks old. I am EFB he’s taken a bottle a few times of pumped milk. I am stressing out as I’ll have 0 arm function and my brace will get in the way of any feeding on that side, don’t really want to switch to formula but might have to do both, anyone out there doing both formula and breastfeeding and if so how are you doing it? Also any tips on how I’ll be able to be a one armed momma for a few weeks 🤦🏼‍♀️