Great! Yes read the RS rows right to left and the WS rows left to right. I’d number the rows or use highlighter tape or sticky notes to keep your place.
M.2 chart repeats across the 12sts so you only need to see one repeat, then follow that set up across.
It seems to me that the chart key should show the open squares as “k on the RS, p on the WS” and the dotted squares, “p on the RS, k on the WS”. That’s what the projects show: