1. No you shouldn’t because you would have a PGWP and are living in Manitoba after graduating from a school in the province. The employer must be on the designated list and your NOC on the in-demand list.
2. I assume you are living in Manitoba after graduating. Do you have a full time permanent position & have your letter from the employer that they will keep you employed for the next year? Maybem8-12 months or so. Others may give more accurate times.