The rightmost button on the bottom nav bar brings up the channels screen. From there you can click the ‘+’ icon in the top right corner to open a channel. You can find good peers to open a channel to with nostr:npub17tlh448s3tfdfgymehqdkdn52as59qsrax0n9h58pk54wcmqyc2qklzsxj
228K sats makes for a pretty small channel though, and if your peer isn’t well connected you might get payment failures. For small amounts, custodial wallets are usually less of a headache.