Canadian job market, work culture & lot of things are much different then Bangladesh.
So, we need to learn more about the changes and adapt ourselves.
Canadian Govt agencies are aware of this & have some programs which help newcomers to integrate into main stream. They provide free job search workshops. And also sector specific Bridging programs. These help to translate the Bangladeshi experience to Canadian job market.
See this link :
Engineer : Working in Ontario http://www.ontarioimmigration.ca/en/working/OI_HOW_WORK_ENGINEER.html
http://accesemployment.ca/index.php/engineering-connections
Studying with OSAP is not always a good solution. Ultimately u will have to repay the money & look for job. So, why not get prepared for job market & start finding job soon? Going after university/college study is not the only solution. It takes a lot of time also. You may consider the other pathways also.
Join the online CIIP sessions and prepare for adapting to Canadian Job market. Don't rely on only other ppls advice. Lot of new options are available now, for newcomers, which were not available even 5 yrs back. Let's take advantage of these.
Best wishes.