Congratulations on preparing ahead of time, that is such a thoughtful thing to do for your breastfeeding journey! Many mums here have found Medela nipple shield to work quite well, as it comes in different sizes which is really important to get the right fit for comfort. I would suggest visiting a lactation consultant or even a Medela certified retailer so they can help you choose the correct size, because the fit really does make a big difference in how well baby can latch. Wishing you all the best, mama, you've got this!