Earlier quoted context omitted.
Having children when you're young is a good idea primarily because kids are exhausting, and take up a LOT of time. Have them as young as you're able and wanting to do so: nothing to do with your gender. Men have fertility issues as they age also.
If you can make a resource by yourself, outsource- in this case, adopt. It will make some of the exhaustion go away, since it seems to be due to diverging circadian rythms between a newborn and an adult. A say 4 years old kid would logically be less exhausting to raise. Also, if the kid is adopted, it also removes fertility issues concerns. Strike 2 birds with 1 stone!
Foster care is another option, it's easier to 'sign up' and you can get school-age kids, who need just as much help as an adopted kid.