I have a razor and am about to start straight shaving. The razor edge has a slight raise on the ends: about 1 millimetre the last 1/2 inch or so at the toe and heel. Will this be good to start shaving with?

How will I maintain the edge; can I use a regular x stroke? I don't have experience with sharpening, so would like to start with the easiest.

I also need to know what is the highest level of grit I need to use for maintaining the razor; I might get a barber hone or water stone. What grit do I need if I use the the stone on its own? or before chromium oxide paste? From what I've read around 0.5 is a good finish. I know from looking at grit comparison charts that there is a difference between stones, but I'm trying to get an idea of what to look for.

For now I thought I would start with an abrasive sheet I can get from Lee Valley. They have 0.5 Silicon Carbide and Chromium Oxide. Would this work?