Had first baby March 2022 want to try for another next month as it will be 6 months in between

I am still pumping for my baby boy so I do not have a period. How hard is it to get pregnant without your period??? Do you have to have sex pretty much most days of week because you don’t know when you’re ovulating? Also let’s say you do get pregnant, when and how did you find out? I found out with I was having baby by missed period first time… would you just find out if you’re, a: nauseous , b: tired all the time , etc?? Thank you! Praying to be blessed with another healthy pregnancy once we start trying next month! Thanks