Please always ask for help if you are unsure.
It can be useful to have a separate email account for job related email communication. You may not wish to give out your existing personal and private email account to job sites, or your existing email address may not contain your real name or give the right impression.
There are many free email services that you can use and links to the two most common ones are listed below.
joe.bloggs@gmail.com
jboggs@hotmail.co.uk
joe_bloggs@gmail.com
joe-bloggs@gmail.com
Only provide the information on the email registration page that you are happy to give out. You may not wish to use your real birthday, maybe a day nearby (keep a note though) or provide your phone number if you don't want to.