Hi Timian. Let's start with the easy answers first: Breast feeding is possible in about half of women who try, regardless of breast size or type. After breast augmentation (and/or lift), the statistics remain about the same, so this should not enter into a decision to undergo surgery. Whatever breastfeeding capability you have now, you should retain after breast surgery.
As to breast implants that don't "show," it appears that your breast anatomy would be best served by a full Wise mastopexy ("anchor" breast lift) plus submuscular silicone (smooth, round) cohesive gel implants. You will not be able to have large implants, and the optimal size will be determined by your size goals combined with your anatomic measurements after (or at the same time as) breast lift. Some surgeons recommend separating the lift procedure and a later breast augmentation, and this may actually be a good plan with your own particular anatomic situation, particularly if you want enlargement to a bigger size than may be possible with a single stage procedure.
Thus, we have also answered your first question: your tubular breast anatomy, large areolas, and wide cleavage will best be addressed by a full Wise mastopexy. Breast augmentation will then be performed to achieve as close to your desired size as your anatomy and lifted breasts safely allow! See the link below for a similar case treated this way. Good luck!