I believe this guide and example cover what you need:
https://winscp.net/eng/docs/guide_automation
https://winscp.net/eng/docs/script_upload_single_file

Hello I'm in need for some expert instructions on how to create an automated script. I've tried to follow the instruction on site with no luck. What I'm looking for is for a simple way to create a script to upload file to .sftp with step by step instructions. For example step 1. open notepad 2. insert this script (specific details on what should go in script) 3. save as .bat in location XYZ.

I've very new to scripting and have found the instructions on the site to leave out very pertinent information to help a newbie.