Using Keychain to swap might be the easiest, yes. Assuming you have android because otherwise you would not be able to swap on a phone.

If you are on PC, use the https://beeswap.dcity.io/pools to swap tokens. You can also do this one on a keychain via the integrated browser. Log in with the account that you want to swap tokens, then swap the amount you need.

Verify the details of the transaction, which helps you understand if you are doing what you want.