Don't copy/paste code examples.
I'm currently learning GoLang, a statically typed language derived from C, as a way to stretch myself as a developer.
One of the mistakes I see burn developers, both new and veteran, is that they copy/paste code examples, strings, basically anything copy/pastable.
There are a few reasons I always write my code by hand and don't copy/paste:
Learning to code, or be an engineer or problem solve (whatever you want to call it) is a long road. Long roads aren't travelled with shortcuts.