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
When writing formal pieces, some pitfalls in the punctuation are easy to avoid once you know them. Punctuation marks such as the comma, the semi-colon, the colon and the period are useful for organising phrases and clauses, facilitating the reading, and disambiguating. However, these marks are also liable to underuse, as in the case of run-on sentences; misuse, as in the comma splice; and overuse, as it often happens with the Oxford comma.