For helpful info on selling a timeshare I’d recommend spending some time on the Timeshare Users Group (TUG) website. https://tug2.net/

It’s an inexpensive membership group of timeshare owners and there is lots of info and people with experience there. You don’t have to join to read info or access the discussion groups. You’ll find a discussion form for Wyndham owners there and lots of people with experience in selling or, as is often the case, giving away your timeshare.

Unfortunately most timeshares don’t have much value for resale but TUG members would be a good resource to find out more about your specific one.