Here are some exemplary design graduate portfolio sites (some taken from last year's "It's nice that" showcase).
There is a wide range of strategies, from the minimal to complex reactive layouts. Have fun exploring.
Jinhwaoh.com https://jinhwaoh.com/
Julie Bonnemoy https://www.juliebonnemoy.com/
Ellen Christensen http://ellenjchristensen.com/
Jenn Livermore https://jennlivermore.com/
Nick Adam https://nickadam.co/projects
Lauren Traugott-Campbell Squishysystems
https://suzychan.com/
https://massaradavid.com/
http://lauracsocsan.com/
http://justincarterphoto.com/
http://stefanietam.com/
http://www.jackwedge.com/
http://romainroucoules.com/index.html
https://esther-cheung.com/#/
http://tanyateibtner.com/
https://joe-jack-chapman.format.com/
https://naomiandersonsubryan.com/
Melbourne designer who won New York TDC Ascenders 2019 http://matterofsorts.com/
Video by Ecal 2019 graduate http://faneliemuselier.com/
https://vimeo.com/349415651#at=12
JPL: https://blog.jpl.design/posts/s20/pixel-by-pixel/cyberflowers/ || https://h-meets-f.netlify.app/
Studio Wrk https://waaark.com/studio/
Rebecca Miller http://www.rebecca-miller-illustration.com/
Philip Popoff https://philip-popoff.net/
Deitch Gallery, NY http://deitch.com/
Lauren McCarthy http://lauren-mccarthy.com/
Kyle MacDonald http://www.kylemcdonald.net/
Uncanny Valley Studios https://uncannyvalley.studio/
Cory Arcangel http://www.coryarcangel.com/
CreativeAI http://www.creativeai.net/
Petra Cortright http://petracortright.com
Purin Phanichphant http://purin.co/Instant-Wallpaper-Generator
Kevin Kuijpers https://www.kevinkuijpers.com
Portfolio tips & advice:"It's nice that" https://www.itsnicethat.com/features/the-graduates-2018-portfolio-tips-040618
Chartered Society of Designers, UK https://www.csd.org.uk/how-to-create-a-great-design-portfolio/
Electronic reading experiment: https://jackielgu.github.io/please-talk-to-me/
Hannah Tardie (elit experiment) https://editor.p5js.org/hannahtardie/full/jLRmt2khh
Some Lynda.com courses on web & Javascript & CSS :
https://www.linkedin.com/learning/css-essential-training-3/styling-documents-consistently
https://www.linkedin.com/learning/typography-for-web-designers/welcome
Chrome Extensions: A list of useful Chrome Extensions for designers