You need to connect your wallet to Binance Smart Chain Network. If there is no Binance Smart Chain Mainnet in your Metamask wallet, you can add Binance Smart Chain Mainnet easily to your Metamask Wallet at this website https://chainlist.org/
2. Buy XMS with BUSD
3. Enter the amount of BUSD you want to buy XMS with, click “Approve BUSD”
4. Click "Confirm Swap"
5. Manually enter in your wallet the XMS address to add XMS to your wallet, then you can see the amount of XMS you just purchased.