I found My knife sharpening experience VERY helpful when I started honing razors. I always ended with feather light strokes and went to a much higher grit stone than most while honing knives. That’s just me though so it wasn’t a big leap to start honing razors. The built in angle for straight razors made it really easy for me to begin with razors although the hardest thing I had to learn was taking it to the “next” level. Before honing razors I never had a knife at that level. After honing razors my knife honing has improved along with everything else I sharpen. I have learned a lot and that knowledge has been transferable. Of course, there are some differences but IMO there are more similarities.

As for a scandi grind, I find that the easiest to maintain but because so much metal is removed due to the large scandi bevel faces they can be a bear to remove chips etc. much like a full wedge.

As for the convexed edge on a razor I find a MICRO convexed edge achieved through some stones, adding a layer of tape, or pasted strops can shave very well.