Expressing after bottle feeding

Debbie • 1st time mammy
My baby was premature and couldn't latch. I expressed into a cup in hospital for 2days but bottle fed him because they wouldn't let us home til he'd had 3 proper feeds. 
He's been almost 48hrs on formula. I have a manual pump-do you think I'd be able to successfully express and feed him breastmilk into a bottle so he gets the best of the breastmilk or have I missed my opportunity?