I'll assume you have some sort of an engineering degree (bachelor's) and are interested in a grad degree.
The options you'll have are 1 year long M.Eng degrees (no thesis) and 2 year long M.Sc. degrees (thesis). There are also 2 year long M.Eng programs I believe, again with no thesis. 1 year M.Eng gets you 1 year long PGWP, 2 year long M.Sc. usually gets you 3 year long PGWP. Since TR to PR is probably not coming back, your only option will be CEC. As you can see, it's a tight fit with a 1 year PGWP because you may not be able to find a job immediately after you graduate. That M.Eng. would give you CRS but that's for FSW, it wouldn't qualify you for CEC. So you have two options;
1. 2 year long M.Eng.: I'd get this. This gets you 2 or 3 year PGWP. More than enough for CEC.
2. 2 year long M.Sc.: If you REALLY wanna write a thesis, get this but it'll be an absolute waste of your time.
Now as you can see in both scenarios you won't be able to work professionally for 2 years since you'll be on a study permit. (yeah yeah study permit holders can work up to 20 hr/wk blah blah. Nobody in Canada will employ you as a study permit holder except McDonald's) And you'll be spending a lot of money at least for 2 years. After you get your degree, you'll need to work for at least 1 year to qualify for CEC so the soonest you can apply for EE under CEC will be 3 years after starting your program.
..........pretty shit deal if you ask me. If you're so ready to quit your career for 2 years and not get a single pay check while spending from your pocket for 2 years, why not quit your job for 12 months at most and go hard on French? That's quicker, cheaper, more comfortable (you'll be spending 12 months at home in the comfort of your room instead of a shared house with 9 other tenants).
Study route is absolutely insane if you were not gonna go for that grad degree anyway.