I've been told to paraphrase, but I don't know how.

In my experience paraphrasing, for most new writers, is an invitation to plagiarize. Be very wary of attempting it if you are not already good at quoting, summarizing, and avoiding puzzle piece plagiarism and replacing that for this plagiarism. Paraphrasing means you take a sentence or two of an author's writing and you rephrase it by (...oh, dear, here we go again...) "putting it in your own words." This is some of the worst advice ever given to new writers because they will commit accidental plagiarism when trying to paraphrase. Think of paraphrasing as writing a very small summary of a very small section of text. It is almost impossible for your brain to not hold onto the words you've read many times over when the text you want to reword is just two sentences. Attempts at paraphrasing are riddled with puzzle piece plagiarism and replacing that for this plagiarism. You will only be able to paraphrase correctly if 1) you already understand how to summarize large sections of text without plagiarizing and 2) you know when to just quote the two sentences and save the bother of paraphrasing. My advice for new writers is to learn first how to quote small sections and to summarize longer sections properly without plagiarizing. If you can do that, then you'll start to sense when to paraphrase and how to do it right.