https://contactforhelp.com/blog/how-can-i-make-my-facebook-page-private/

Let’s see, #howtomakeFacebookprivate. Go to settings and privacy on your profile. Here you will see the option of making your profile from public to private. This will #makeFacebookprivate, you can also make the List of your friends private and select who gets to view your posts. This should help you with the query of #howtomakemyFacebookprivate and secure your profile.