Hey @mithushalk - for sure, here:

⭐Step 1 - You already got this! The screenshot. I am saving it to desktop.
⭐Step 2 - A brand spankin' new Chrome instance (or Edge, whatever your fancy is.) I'm sending it directly to my library.
⭐Step 3 - I'm using the UI element selector to click on the Upload button.
⭐Step 4 - Sending a mouse click because the UI selector wont pick up the "File" option. I moused around until I was right over the word "Files" and then grabbed the X, Y coordinates that PAD tells us. I input those numbers into the X & Y relative to the screen itself.
⭐Step 5 - Send keys! Since I'm only using "screenshot.png", I hardcoded it and just typed it in. I don't know if this is something you'll want to overwrite each time or keep a log.
⭐Step 6 - Finally, click on another UI element - the "Open" button.
Tahdah, screenshot uploaded. Celebrate.