help getting baby to take bottle

Trying to introduce my 6wk baby to the bottle. I'm exclusively breastfeeding. We've tried a few nipples, kiinde, munchkin latch, and tommee tippee. I have an overactive letdown so I'm wondering if that's affecting it. Like maybe she's just used to the milk flowing really easily? She doesn't try to suck or latch or anything even if she's hungry. Any tips? We might just need more practice...