Is it worth learning how to use a reference management system such as Zotero? Maybe.
The hours you invest in learning how to use Zotero (approx. 10 hours) are likely to pay off, as they will save you a lot of time that you would otherwise spend formatting, revising and correcting references. In addition, this skill would become part of your skill set.
A great guide
Free, online webinars in which you could participate and ask questions