I found exchangers using cards via the Internet. In the exchange, I communicated through the translator app. I exchanged $100 for Qatari money. The exchange operation cost three rials. It is a pity that tour operators do not have a special guide with detailed information about the nuances of the country. The exchange takes place according to the passport. There are also nuances about the maximum amount of exchange, other tourists were unhappy about this. I do not know if it is possible to export Qatar's currency to other countries.