Quoting L&B +1:" Congrats on baby 5! I just always had it in my head that it would be more difficult than bottle feeding. ... [snip!] ... I wont know until I try. I'm just afraid I wont be able to handle it and will feel like a failure for quitting or something"
If you don't like it or baby has issues you can stop and you shouldn't feel like a failure at all. You do your best and just try, that's all we can do in the end after all. I have definitely grown with each of my kids and I have regrets I didn't breastfeed longer with my first three honestly but I'm still very proud of each of our journeys that we made it as far as we did. My first I breastfed till 4 months because I got pregnant (my OB said I should stop) and we'd had NICU time at the beginning which did make things more challenging but 4 months is longer than many do after all. My second I breastfed 8 months, my third 10 months (she self weaned because of pregnancy). Now with my fourth we're still going strong at 13 months.
In my experience it's best to make short term goals and be ready to adapt to you and your child's needs. The colostrum baby receives right after birth is the most important to them so first goal maybe 1 week breastfeeding. If that is awful stop after and be proud of your goal but if not maybe try for a month, then 3, then 6 and so on. Each time you meet a goal reevaluate. In some of the rougher moments (which are rare but with teething or sickness do happen for sure) knowing you are so close to your next goal and then you can decide if you want to stop or not then can help you keep going that much longer and calm down and figure out what's really best for you both.
Good luck when the time comes!