@Diciannove44 can't say since i didn't read the ln, but comparing with the manga, that follows the ln, the wn fells more laid back to me (at least until the part i read) and some events have a slight different order.
@kurokawa around the chapter 10 of web novel but with some minor differences. I don't think you will fell lost with the differences but since there are only 10 chapters why not start from ch 1?
@Diciannove44 title page, look for Nove Updates in the information section. About which one is is...