Postpartum need help starting FAM

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Hi ladies, anyone post partum and breast feeding who use FAM and natural family planning? I am breastfeeding 2 months PP but I think I got my period back (it was pretty light.) hubby and I want to wait a bit before having another and not fan of hormonal BC/condoms.

Anyone else in my shoes? How do I get started on this method? I’m aware of cervical positioning and mucus but how do I do the temping? How do I track nasal temp vs. Oral temp?