Fixing or adjusting the Styles of a MS Word document

I need assistance in fixing or adjusting the Styles of a MS Word document and adding a table of contents.
I will share my screen via Zoom and I will give you control to work remotely on my computer while you explain to me what are you doing or guide me to do it myself.
If you are not sure how to control another person’s screen on Zoom, please see this video: https://www.youtube.com/watch?v=dGDliqCvQDY
The expected time to finish the job is 30 minutes.
The candidate must be UK-based and have experience working on MS Word as an advanced user.