There are open-source applications developed by the community that act as a proper desktop interface for Instagram with built-in downloading.
The most direct way to get Instagram on your PC is through the official Instagram app on the Microsoft Store. This version is a Progressive Web App (PWA) that acts as a dedicated wrapper for the platform, offering a cleaner experience than a standard browser tab. instagram download for pc
Once installed, you can launch the app and log in with your credentials. instagram download for pc