Sale of our timeshare (sch D)? Is this the proper sch to report on whether there is profit or a loos?

yes

You will treat this as the sale of a capital asset. (However, Losses from the sale of a personal use timeshare are deemed to be personal losses and are not deductible)

see this thread for guidance

https://ttlc.intuit.com/community/tax-credits-deductions/discussion/entering-sale-of-timeshare/00/410413#:~:text=Entering%20sale%20of%20timeshare.%20Once%20you%20are%20in,%28jump%20to%20full%20list%29%20Scroll%20down%20the%20