Maybe, but I would argue that the opposite is true. Modifying something – instead of building from scratch – can be a viable path to acquire a new skill. For example, instead of designing and building a house as a first project, one can learn the ropes on an existing home. Paint a ceiling, install laminate flooring, build an interior wall, tear another one down, and so on.
As I touched on earlier, we all prefer learning in different ways. The already linked resources may be balanced wrong according to your current skills and previous experiences. As I don’t know you or how you learn, it’s a bit of a challenge to recommend resources.
I’m sure of one thing: no human being is born with the skill of building Hugo Templates. I’m also pretty sure you can do this!
But you can also ask yourself: is this something I need to or want to learn? What’s the goal? Is it to learn something new and have fun doing it? Or is it to have a page listing your blog posts in chronological order?
If it’s the latter: you could just have someone else do it for you.
All that said, I would love to figure out what’s going on. Send over a link to the blog in question, and I will take a look.