Your research resource guide is basically just an annotated bibliography, and that means it's a Works Cited list but with a paragraph of justification after each source. You can spend some time summarizing* the source, but you also need to make sure you're explicitly stating how that source helps! Why this one and not some other source? Why this one in addition to the other ones?  What does that source do to help you explain your artist?

*Note: the summary must also be original to you. You may not use the publisher-provided summary in your work.

 

Bad example:

“Timeline.” Andrew Wyeth, andrewwyeth.com/timeline/. Accessed 15 Oct. 2020.
Timeline of Wyeth's art and life.

 

Better example:

“Timeline.” Andrew Wyeth, andrewwyeth.com/timeline/. Accessed 15 Oct. 2020.
From the official Andrew Wyeth website, this timeline documents Wyeth’s life in both personal and professional capacities, from his birth to his being enrolled in art school, his marriage and his father’s death, and also inserts the start and completions of major pieces he painted, as well as exhibitions his work was displayed in. This page is the most informative about the artist on this site: no other narrative biography is given. An image gallery provides an overview of his works for browsing.

 

Calculated risk time:

Not that your librarian would condone skipping parts of an assignment... but... if you're very confident about the accuracy of the rest of your assignment, the annotations altogether are only worth 5 of 100 points. The most important thing is the quality and quantity of the sources your select (80/100). So if you're in a bit of a rush, then honestly, the annotations are an easy place to slack off a little without much cost to you overall. (Note: this means do an overly-simple job or skip it, but do not copy/paste/tweak publisher-provided summaries to take the place of proper annotations. That is plagiarism. You'd be better off skipping it than plagiarising.)

On the other hand, everything can add up: if you botch the annotations and the citations and the formatting and having a scholarly source, suddenly an 80 is the highest you can earn. Do the best you can at all parts of the assignment to protect yourself!

Also, annotated bibliographies are a pretty common assignment. Might as well practice at this while the stakes are lower!