Hello,
I believe the best advice depends on your current financial situation and your educational background.
The great advantage you have is that you have a Canadian education credential.
The best thing for you to do is to volunteer with an association which is most closely in line with your education. Once you do this, you can have some Canadian experience and Canadian references as well as be able to network in your choosen field. DO NOT UNDER ESTIMATE THE GREAT BENEFIT OF NETWORK. Try to go to events in your field and meet with people in your field. I believe some associations such as maytree foundation opportunities for mentorship. Find out about associations that offer mentorship programs for new immigrants.
The other option is for you to complete a certificate program by national associations (by writing a recognized national or international exam). Although, its much much (a lot more, Cant emphasize enough) common for immigrants with credentials to not get a job in their field, it is not uncommon for Canadians to not get a job in their field, especially with basic (e.g. science) degree. Look online for the types of jobs that you are thinking of, and see if their is a certificate program that will put you on the edge greater than other applicants. For example, for individuals with bachelors degree in business or IT, credentials such as project management certification, CISA designation, Business Analyst etc. may work. Of course, this will definately have associated cost.
Try to get a job, any kind of job that is related to your field of study.
I would not encourage you to work at Tim Hortons if it is not related to your future career. But for example, if your career before was restaurant management, then it may be a good idea.
But of course, if choosing between not working at all and associated starvation versus working at Tim Hortons, Tim Hortons is better (used to work there in high school and I now teach health care professionals). The important thing is that you should not get stuck in low paying job as this is common for immigrants. Hence, if you do this, make sure you still have time on your hand to volunteer in your occupation or to network with individuals in your occupation.
This are my thoughts.