I have just started the training. creating a user for my org. but an email link is not created to generate a password

Help check your spam folder if you received. Also help check under set up || email deliverability.. if setting is defined correctly.

another place to check is the IP address.

help check below article for troubleshooting steps.

https://help.salesforce.com/s/articleView?id=000325381&type=1

hope link is helpful