Start here for spousal sponsorship.
http://www.cic.gc.ca/english/information/applications/spouse.asp
A lot of paperwork and documents. All MUST be on paper and mailed (no on line facility). You can do it all without a lawyer and most people do. You really need to at least start looking at tge checklist, the forms and the really rather good official CIC online help facility. You have a LOT of reading in front of you and there is no shortcut to this.
