Canadian Criminal Equivalency (
https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=149&top=8) is what the notes refer to, as far as I know. You need to research and attach proof of what exactly the charge against you was, and what the equivalent charge is according to Canadian laws, regulations, and jurisdiction (
https://laws-lois.justice.gc.ca/eng/acts/C-46/). There maybe a difference, but I'm not a lawyer or an expert.
I would urge you to contact a competent lawyer and a RCIC certified immigration consultant in Canada, to figure out what you need to do. Gathering information on your offence 19 years ago and ensuring you file your application properly. Once you figure this out, then you need to address the second point raised in the GCMS notes, which is applying to the right program based on your past experience, and degrees.
This is a long road, and you need to do things by the book. The Five-Eyes Intelligence Alliance, monitors and shares information about applicants and residents of five countries (USA, Canada, New Zealand, the UK, and Australia). This means that, even if you drop the idea of applying to Canada, and apply to any of the other countries, your past offence will still come to light, and it will be your responsibility to provide information on that, and demonstrate that you've rehabilitated.
Drop the agents in your home country and get yourself a competent Lawyer/RCIC consultant before you proceed. Good luck.