If you already have XTZ in your crypto wallet please go straight to step 2. Otherwise, the easiest way to buy XTZ is to go to an exchange which supports it, for example Bitpanda (only for EU citizens), Kraken.
Depending on the exchange, you will be able to pay for XTZ with fiat currencies or with cryptoassets. The list of exchanges is dynamic as new projects are arriving to the market all the time. We are currently working on establishing partnerships with exchanges and recommend choosing a trusted exchange.