Well, there’s not really that many free templates in Webflow’s template shop: 1000+ Free HTML5 Website Templates 2022 - Webflow so you might just have to browse these to see what suits. Also, the free plan has a restriction of 1 static pages per project, so you’ll just have to see if you can even use templates that have more pages… Of course there is always the Webflow showcase with cloneable projects… you can search for cool sites others have done here: http://showcasesearch.webflow.io/
That said, if you’re serious about letting people hire you for your service - why not purchase a paid plan + a premium template and get it all set up nicely! Good luck with everything & merry Xmas!