Futures, if there is no buyer at maturity, will the seller still purchase the goods?

This situation is impossible. The exchange will confirm the trading instructions involved in the delivery and strictly follow the process. The cost of breaking the contract will be even greater.

If I bought some at that time and later stopped selling them, would I really want to buy them?

Yes, individual families can't deliver cash.

This is not a virtual investment.

If in doubt, please ask.