FSA BB30 MR190 6806, Silver | Bikeinn or use any other bearing from any other side that has the bearing code 6806.
Cannondale does sell “their” special tool but it is a box standard bb removal tool.
Park Tool BBT-30.4 Bearing Tool Set | Tredz Bikes just get the Park Tool one - if you stick with Cannondale you’ll need it often.
To remove the crank you loosen the screw on the non drive side untill it comes off. To remove the crankarm you will need a Shimano crankarm removal tool and a rod just a bit shorter than the bb shell width - ( there is also a special Cannondale tool for this if you can find it) . Just do it like in this video:
HACK On How To Remove Cannondale Hollowgram Crankset With Simple Tools. - YouTube
Take grease on metal contact surfaces that is waterproof or use a very light locktight on the bb shell.
Take of your crank and then just do what they do here BBT-30.4 Bottom Bracket Tool Set - YouTube