Visitor visa that comes with work permit...and we are still in nigeria
You have misunderstood the rules and do not qualify for an open work permit. If you wish to work in Canada, you must obtain a full time job offer from an employer in Canada, that employer needs to obtain an approved LMIA, and then you must apply for a closed work permit.
To visit Canada, you would be applying for a normal tourist visa (temporary resident visa - TRV). There is no open work permit granted with a TRV.
Open work permits are only granted with TRPs (temporary resident permit). TRPs and TRVs are not the same thing. TRPs are very hard to get and are only available to people who are inadmissible to Canada (typically due to a crime).