Go to this site: https://temp-mail.org/en/ 
https://imgur.com/a/EIkJJ2E (Visual)
Copy the temporary email from there.
Go to: https://www.instagram.com/accounts/emailsignup/ 


Fill in the details: 
1) Paste the email which you have copied earlier
2) Keep name whatever you like
3) Keep password " Aaddeiime1 " 
4) Username whatever you like just do it quick


After you create account just pass the username to me.