The traditional methods of domaining are slowly winding down.
Hand registering .CO domains the way people hand registered .COMs in the 1990's will not work. If you want some good advice, forget about .CO and hand registering and ponder the old adage 'it takes money to make money', then begin researching aftermarket opportunities.
Around 90% of the people that enter this forum ignore this advice. Don't be one of those unfortunate souls. IMO.