I'm not going to step in the own idea/other's idea part because I'm unfamiliar with writing, but taking an English course doesn't really teach you to write. Sure, it'll teach you grammar and vocabulary and help you write good essays, but in my opinion, writing is completely different. An English class doesn't teach you how to portray a cheerful character differently compared to an aggressive one or how to describe an object differently through different people's eyes, and these are a few I could think of at the top of my head. Just wanted to put this out.
And what I mean by all my rants that you can't teach about writing, you should 'feel' it. There are no boundaries in writing, nor there are rights and wrongs here. That's why all these 'writing courses' is utter garbage. That's why if you write something you don't like to, something that you have no attachment to, you are wasting your time. I highly doubt that the author should use 'templates'. Sure, you can ask for advice, but if you are constantly relying on advices, would you develop your own style?
Also, what one would name garbage, the other person would identify as a genius writing. It's highly subjective. Honestly, the only advice that really matters is that you shouldn't leave big plotholes. That's it. You are good to go.
People like to use different kinds of art to show an example in writing. Imagine if game developers used the same templates over and over again? Imagine if someone like Salvador Dali would write 'simple' portraits? What if Joanne Rowling asked everyone around if her MCs are likable or not? And so on.
What I want to say is, don't rely on others. People who sit on this forum aren't the ones who are successful authors on scribble. In fact, most of them aren't successful. Do what you feel is right, and gauge everything through your own feelings. Btw, this also means that you don't need to listen to my advice. Anyway, sorry for ranting, and I hope you will enjoy writing whatever you decide to write. Either your own idea or someone else's.