Yes, you need a rolling X to get the toe and heel and NO, do not do a 45 degree stroke, just set the bevel and tape the spine so you do not wear it away excessively.
Also look like the beginnings of a heel spur, from honing just as you are doing now. Round out that heel with a diamond file, or 1k ish stone. If you don’t it will be a blood letter.
15 um should set the bevel with the proper stroke, as will 1K wet & dry it will stick to your substrate, if it is flat like film.
It is much easier to set the bevel on a stone or 1K diamond plate with lite strokes then switch to film.
Tape the spine and ink the bevel to see your progress.
Find a local mentor to cut your learning curve.
What are you using as a substrate?