In order to purchase RFR, you'll first need to have a wallet - please don't use the exchange wallets! Metamask is a favorite, and isn't hard to set up.
Once you have a wallet, RFR tokens can be purchased on several different exchanges, with more on the way. For now, here are a few favorites with articles on how to purchase RFR tokens:
(Please note OKEX presently does not serve customers in the following countries/regions/territories: Hong Kong, Cuba, Iran, North Korea, Sudan, Crimea, Syria, USA [including all USA territories like Puerto Rico, American Samoa, Guam, Northern Mariana Island, and the US Virgin Islands (St. Croix, St. John and St. Thomas)], Bangladesh, Bolivia, Ecuador, and Kyrgyzstan. We are sorry for the inconvenience.