Man, I feel this. Trying to find a reliable spot for 'Watching My Step' can be a bit of a scavenger hunt since it's not on the biggest platforms. I finally found it on Tapas, which is where the creator officially serializes it. The app's pretty decent for reading on your phone, and they've got a coin system for unlocking episodes ahead of the free schedule. It's a legal, direct way to support the artist.
Sometimes I see people asking about it on Webtoon or MangaPlus, but it's not there. The confusion might come from similar titles or fan translations floating around on sketchy aggregate sites, but those are a minefield of bad ads and don't help the creator at all. Sticking with Tapas is the surest bet.
What I like about reading it there is the community aspect—you can comment on each episode and see others' reactions, which adds to the fun, especially for a drama-heavy series like this. The official translation is consistent, too, so you're getting the story as intended, not a garbled version. It’s just a relief to have a legitimate home for it.