You can get started in the following two ways:
After getting on the tool page, you will have to enter the username of the account which you wish to view. You need to make sure the username would be same otherwise you would not get the access of the profile.
After entering the username, seeprivateinsta would start concocting it may take a while. Afterwards, in the 3rd step, the website would show you the account details of a particular person, and all you need to do is to confirm the account by clicking on the button.
In the 4th step, Gwaa would ask I am not a robot verification. In this step, you only need to verify yourself by clicking I am not robot button, and there you go in the next step.
In this step, the website, seeprivateinsta would show you the Instagram posts of the target account, and you can easily download and stalk their uploads and can observe their activities.
Now you can view your desirable private profile and its activities on social media.