I am an iPhone user by habit. I am concerned about privacy but somewhat, and admittedly lazy about it when it comes to my phone. I found these tutorials useful to easily get past some of the battery drain and privacy issues. 

https://youtu.be/XpcpUga_Zu8?si=CjkZhmUpUNO6Qsmm

https://youtu.be/TjwmaAqS7IA?si=OlDTnoBXqIIgnW8c