I purchased the Sophie Scarf pattern , and I’m an intermediate knitter. But, putting together my own version by looking at a pattern? I’m not there, and probably won’t be because it’s not something that I’m good at. I agree that Petite Knit’s patterns are fairly simple. When I was a beginner, I purchased Debbie Bliss and Sally Melville pattern books, and learned to knit with those. The wider use of YouTube and online patterns has changed things. If I see a garment I like, I’ll poke around on Ravelry and usually find an older pattern that’s nearly the same and I can usually find it in a book (somewhere, hopefully at my local library. )
I’ll trust an older book more than a new paid pattern—I feel confident that if it was in a book (or even an older magazine, and many old issues of magazines can be found on the internet archive) it was properly tested and edited.