Welcome to Microsoft Q&A! Thanks for posting the question.
As per my knowledge, the deployment depends on the region in which the webapp is deployed. If the region is running hot, webapp deployment might take a lot of time and, the time should be the same as creating a new webapp using the azure portal.
Can you please provide a screenshot of what you are seeing - "After deploying it, it just loads in the notification section but never finishes"?
Thanks
Saurabh