oosman said:
how to apply for off campus jobs after first 6 months of study and then pr?
To find out about how to apply for off campus jobs first you need an off campus work permit. Check the following site:
http://www.cic.gc.ca/english/study/work-offcampus.asp
If you are interested in immigrating to Canada than check the following site:
http://www.cic.gc.ca/english/immigrate/index.asp
If after reading these sites and following their links you do not understand or have specific questions which are not addressed feel free to ask. Both questions you ask are open ended and I have given you 2 open ended links.
