What does stuck mean?
Please share what you have. There are many examples of how to do what you are asking.
1. When a response is submitted
2. Get response details
3. Create a copy of the word template (which you should have stored somewhere)
--use Get File Content
--use Create file naming it whatever
use the SharePoint or OneDrive actions
4. Fill in the template with the answers
5. Now use get file content to get the file content from the new document you created and populated.
6. Use Send Email V2 or Send Email (depending on if its Corp exchange etc)
--In the advanced section, set the file name
-- in the advanced section, use the content from step 5 as the Attachment
And done
If you can show what you have built, compared to this and see what exactly you need help with. but if you have not written anything, then please follow those steps and do some google searches so we can help you build it.
Cheers