Click your profile icon on the bottom right hand corner of the app

Here you can edit your contact information and add your birthday

Enter your current and new password. Re-type your new password and click change password

Select the account you want to enable two-factor authentication 

Choose the method to enable two-factor authentication. BlackCloak recommends using an authentication app

Download an authentication app and either scan the QR code or enter in the key. Once you do, click next

Enter the six digit code from your authentication app and click next to finish

Here, you can see every device and location where you logged in. If you don't recognize a login, click on it and select log out

Click this button to make your account private. The only people who can see your profile are those who you personally approve

Here, you can choose who can tag you in photos and videos

On the same page, you can choose who can mention you in pieces of content

In your phone's settings, search for Instagram. Then click location

On this screen, you can choose when Instagram uses your location

Here, you can search for ad topics you want to see fewer adds for, and the topics advertisers have used to reach you

Click activity information from ad partners

Here, you can choose whether Instagram can use your activity information from ad partners to show you targeted ads

Instagram Hardening Guide