You can't exchange HIVE POWER for anything but HIVE with a 13-week power down, Barb.
You won't be able to exchange HIVE to USD directly, but you will be able to exchange HIVE to BTC, and then withdraw the BTC to USD from a place that works with fiat currency/credit cards/bank accounts and allows off-ramps. Coinbase works in the United States for that, I believe.
For now, I would wait for their Leodex front end to become more stable (fewer changes), and to see some people who have used it successfully with Hive. For example, you can use LEO to get some ETH for fees on Arbitrum (you can't do anything without it with LEO or Hive on Maya). I paid the LEO, and the transaction went through at both ends, but I don't see any effects on the interface (it still says I don't have any ETH funds for fees).