When fertile again?

Hi everyone,

We’ve made up our minds! We want to “try” to get pregnant again, but....
No idea when my ovulation is?
I recently gave birth to a baby boy who passed away and was then curedtted.
So very sad all around..
In the meantime, I’m no longer bleeding or having discharge, but VERY rarely still have brownish discharge.
It’s white but not much.
Can I count like the cycle calendar apps? So base it on “just finished menstruation” or will ovulation still take a while? When will ovulation/menstruation occur?
Or is this different for each person?
Does white discharge say something?
Does anyone have experience with this?