To make your Instagram account private, go to "Settings" and select "Privacy and Security." From there, select "Account Privacy." From here, you can choose who can see your posts and stories. You can choose to make them public, share them with only your followers, or keep them hidden from everyone. You can also choose to hide your profile from search engines. This way, people won't be able to find your account unless they have your username. If you think someone is stalking you on Instagram, it's a good idea to make your account private.