How to post Instagram on PC ?

https://vivaldi.com/

https://www.techradar.com/au/how-to/upload-photos-to-instagram-from-a-pc

I METOD:

1. Get Vivaldi
The super-customizable web browser Vivaldi offers the quickest and easiest way to upload photos to Instagram from a PC or Mac. It does this by running the mobile version of Instagram's website in a web panel.

Download and install Vivaldi, then either run through the wizard to import bookmarks and set your preferences,  or click 'Skip all' and continue with the browser's default settings.

2. Create a web panel

Navigate to www.instagram.com, then click the plus icon (Add Web Panel) on the left-hand side of the browser interface. The URL will be filled in automatically, so all you have to do is click the plus again.

The mobile version of Instagram will now appear in a sidebar on the left-hand side of the browser, and will stay there as you browse other sites. Log into your account, then resize the sidebar until the mobile site fits in comfortably.

3. Upload to Instagram

Click the plus icon at the bottom of the website to choose a photo from your PC or Mac, apply filters, add a caption and tags, and upload it to your account.