Yes that is correct.
I just SSH into my server and open a shell to edit my crontab. Vi is my editor and can be a bit confusing. Here is a page on using Vi.
http://staff.washington.edu/rells/R110/#basics5
SSH into your server
ssh
USERNAME@YOURDOMAIN.com
HIT RETURN
it will ask you for your password and not show what you type.
HIT RETURN
crontab -e
HIT RETURN
This should put you in your default editor which most likely is Vi