Hey @ikmalfikri
This is a little convoluted... but this approach would work.
1) Convert the Word Document to a PDF
2) Extract the first page of the Word Document as an Image
3) Resize the image
4) Upload the image to storage
5) Build the HTML Email
6) Send the email
NOTE: Email clients like Outlook do not support DataUri's so that is why you need to upload the image file to storage.
Here is the flow:

Here is the output:

JSON for Image Extraction:
[
{
"Name": "FirstPage",
"LowerLeftXCoordinate": 0,
"LowerLeftYCoordinate": 0,
"UpperRightXCoordinate": 0,
"UpperRightYCoordinate": 0,
"PageNumber": 1,
"ImageType": "PNG",
"ExtractEntirePage": true,
"Resolution": 300
}
]
Expressions (in order):
first(outputs('Extract_Images_from_PDF')?['body/Images'])?['Filename']
first(outputs('Extract_Images_from_PDF')?['body/Images'])?['FileContent']
HTH
Jay