I have had two c-sections-- the first after 26 hours of labor, and the second planned with no labor. Honestly, breastfeeding was easier the second time-- partly because I had some experience, but also partly because I wasn't so exhausted afterwards. (With DD1, I hadn't slept for two full nights, by the time she was born.)
Difficulties you might run into with a section are numerous, but they can all be overcome. You might find positioning the baby difficult, if you are in pain post-op. Please do not hesitate to use the pain meds offered. Pain can inhibit milk letdown, and interfere with getting an effective latch, and make you spend less time nursing than is optimal. You might find the milk comes in a bit more slowly than average-- I've heard that sometimes happens. You might also find that baby seems to lose more weight than is normally considered acceptable, before starting to gain-- that's because they pump you full of IV fluids before the section. Baby gets the fluids too, and is born full of them and thus has a birthweight that is artificially high. The weight loss is normal and nothing to worry about. Finally, you may run into all of the other normal challenges that come up in the newborn period, but people may try and tell you it's because you had a c-section, rather than reassuring you that what's happening is common and normal. So it's good to look for knowledgeable help ahead of time-- a LLL leader, a good certified lactation consultant, or a pediatrician who's well-informed about breastfeeding difficulties.
Some mamas having planned sections have problems that are more related to mild prematurity-- like sluggishness and weak suck, for instance. So I think you are right to want to wait until you go into labor naturally or at least until you reach 40 weeks. A big full-term baby is less likely to have these problems.
me , he , my three , , and -- and the one we lost