No problem! For the Trivia and hyperlinks, you should use the source editor. You can find it by going into the Classic Editor, which you do by clicking on the down arrow besides the "Edit" button and then pressing "Classic Editor." After that, you go into the "Source editor," which you'll find on top of the editing page.
In the source editor, to add a new section, like "Trivia," you just do ==Trivia== (two equals signs, the section name, and then two more equals signs)
Hyperlinks are another case. It depends on if the hyperlink is supposed to be to another website or another article. For other website, you basically do like this:
I've basically put my link into brackets, and then put "Google" after the link, meaning that the link will put the user into the google.com website, but the actual text on the page will just say "Google."
For hyperlinks to other articles, it's as simple as just taking the article name and putting double-brackets on them, like this:
It's simple, and even if you still don't understand, I'm sure the guides on how to edit have better explanations. Even if you continue to not understand, I'll be around the Recent Changes section, so I can still check on your edits for mistakes. Have a nice day!