TTC while breastfeeding

My daughter will be 18 months at the end of this month. My husband & I recently decided we wanted to start trying for baby #2. Buuutttt, I’m still nursing my daughter. She only nurses once maybe twice a day. I had my first cycle in November 2020. & have had a consistent period since January. If I’m not pregnant this cycle, I plan to start tracking down to the T, next cycle. My question is, does anyone know anything that could help fertility while breastfeeding?