Best timing for ttc girl after pregnancy

Hi everyone,
I gave birth to my first lovely daughter in September. I was wondering what would be the best timing to start trying for another girl? Would that be a year after giving birth, 18 months or more? I know there is no exact answer and no guarantee but I would like for our second sway to go as well as our first did. I plan on following the diet again and doing things like I did them the first time. Things worth noting: I am breastfeeding and my cycles have not restarted yet again (8 months pp).