OP, you go online to the Ont website for superior courts, then navigate to small claims court, all the paperwork and plain language directions are provided there. What you will NOT find is legal advice. to get that you can google what your hoping to sue for and generally there are "helpful tips" type pages put up by paralegals and law firms, you may find, some direction there.
Having been to small claims before, (NOT as a defendant, but a plaintiff). As stated above you NEED to show ACTUAL damages, (IE you own a business, and due to someone else's actions, including written documents etc, that your business has suffered), IE last year sales were $125,000 then someone wrote something derogatory, and this year, (with all else being equal, {IE you have changed locations or a contract expired, etc}), this years sales are $55,000, then you can sue for $50,000( IF you went to superior court IF small claims the limit is $25,000). If you were fired as a result of someone elses actions words then you can recover lost income, BUT it is incumbent upon you to seek IMMEDIATE employment to mitigate your damages.
But if your "feelings" were hurt then there is NO recourse in court for you. Put on your big girl panties and move on..lmao