CWB certification will be for the "organization" it is entirely different from AWS D1.1 code.
Assuming structural steel you will need to go through quite a bit of preparation... It goes far beyond a welder test.
**All welding procedures must be approved by the CWB "Procedures Group" whether they are prequalified or qualified by testing.
**All PQR's and Welder Performance Qualification testing must be witnessed by a CWB Rep. There are no in-house options beyond provisional tests which only are good until the next CWB rep audit.
Rather than trying to explain in a post... Let me give you a link for Company certification to W47.1 Which is the structural steel welding certification. CSA W59 is the actual welding code for structural steel.
https://www.cwbgroup.org/services/certification-and-qualification/csa-w471-fusion-welding-steel-company-certificationAfter you go to the link and follow the various tracks, I think you will have some idea of the scope of CWB certification.
Once you have digested that for a bit.. Come back with your specific questions.
Good luck in your endeavor.