My question concerns sharpening stones and sharpening a razor.

I want to start sharpening and I have a few choices near me. I have heard good things about the Norton 4/8K, but I would also like to know if the King 4K and 8K compared and if they were a good choice. I have a 1/2" razor, I think a 1/2 or full hollow, and a 5/8 Sheffield that I will sharpen in the future, after I get more skill. I don't know what type of razors I will get in the future so am interested if these hones work on various steels. Just sharpening for myself at this point.

If I get the Norton 4/8K do you have suggestions on flattening. I've read that the 4K is a chore, so that is why I thought of the King stones. I don't want to buy a dmt at this point.

Is lapping film a good choice. I have these grits available:
15 Silicon Carbide, Plain
15µ Silicon Carbide, PSA
5µ Silicon Carbide, Plain
5µ Silicon Carbide, PSA
0.5µ Chromium Oxide, Plain

At this point the 1/2" razor is pulling a bit. I tried some 0.5 Chromium lapping film, but didn't seem to do it, although I am new to sharpening. This razor isn't anything special, so I thought I could learn on it. How do I know where to start and to switch between grits like 1,4, and 8K?

Thanks for advice