The WordPress text editor (default or advanced) has two ways of adding text. With the Visual mode or Text mode. Visual is what you're using 95% of times while creating posts and pages, it makes creating posts very easy since HTML knowledge is not needed. Text is only used if you need to make some changes within the HTML text, where you can edit the source code.
1. Adding HTML code to the Text Editor
The Text editor displays the raw HTML code, which the Visual editor displays as it later will be on the website.
2. Custom HTML and JS plugin
After you've acquired a VPN, you need to set it correctly up. Read carefully the installation or setup guide which can be found on each providers website - or if you're lucky, you'll get a software that makes everything really easy. Activate your VPN and choose a location different than your country. Visit this page and see if your current connection is from a different country.
You can use this as a reference:
Your current IP address is: 188.8.131.52
Country: United States