Thank you for your question. To load your website from a specific folder, or redirect a domain without changing the URL, I recommend this tutorial which includes several examples.
First, I tested the .htaccess file successfully. Then, I reviewed your .htaccess rules and there are a lot of redirects within it, which can lead to problems, or possibly throw errors.
The easiest way to accomplish this would be to request a document root change, then do a host file modification so you can view the domain on the Server's IP.
To request a document root change, submit a written request to Live Tech Support at: firstname.lastname@example.org, be sure to include either your current Amp password, or the last 4 digits of the current credit card that we have on file for verification.
If you have any further questions, feel free to post them below.
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