Answers to your queries:
1. Go to "Profile" at the top right corner of the page. You can enter your profile details there. But I think you need to have made a minimum number of posts before you can enter your details. Not sure what that number is. Others, correct me if I am wrong.
2. You can become a gas station attendant, a cab driver, a janitor, or anything you please once you have got your PR status. In fact, if what I've been reading on other threads about the job scene in Canada is true, we may actually end up doing those kinds of jobs when we get there. So, be prepared, and along with practising for your licensure exams, practise how to handle a broom and mop, as well. ;D