For finishing a razor you want something over 8k in grit. The 2000/ 5000 will do well for setting bevels and sharpening in that order. Then you need a finisher you can go barber, 8k, 10k or 12k or higher in synthetics. Your other options for a finisher are natural hones such as coutical, Escher, black or translucent ark and one of the many others. As to which on its a matter of preference.
Now as the other guys have said knife and razor honing are very different beast so read up one honing. It's not rocket sci but it is a learned skill that takes time.