On apple there is an app called mynetdiary. HIGHLY recommended to help answer your questions. It sounds like finances are an issue, but the paid version really helps you dial in nutrition with detailed nutrient info and meal plans. The key feature of this app for me was the predicted weight loss trend line… and then seeing my results line up perfectly. It’s almost like they knew what they were talking about.
DO NOT go below bmr…
If you are going into deficit, stave off the full effect of adaptive thermogenesis (“starvation mode”) with weights and higher levels of protein.