You should see available projects under Open Projects after you login. Your email is your username and the password was emailed to you (check your spam folder if you do not see the email with the password).
If no available projects are shown, it's likely because all projects are currently being worked on by other bilinguals or there is a technical issue (not likely).
Don't forget to install the translators app and enable notifications to get real-time alerts about new projects. Remember, working on projects qualifies you to receive more projects.