A one year course in a public college will only qualify for a one year post grad work permit and unless you are extremely lucky the chances of walking straight into a job from graduation odds are not good to gain a full year Canadian work experience.
This is why people generally recommend going for a 2 year course at the outset and whilst as you can read in the PGWP links that 2x1 year course back to back generally can qualify for upto 3 years post grad permit it would be less hassle to go 2 years from the outset. Note always attend public colleges not private as private colleges generally do not qualify for a post grad work permit
https://www.canada.ca/en/immigratio...mits/post-graduation-work-permit-program.html