Connection to Oracle Cloud Autonomous Database

Even though the option to connect to Oracle cloud exists in principle, the parameters to connect to an Oracle Cloud Autonomous Database do not seem to be inadequate to establish such connection. I’ve never had easy time connecting to Oracle, and maybe that’s the case here too. But it is very difficult to marry the Oracle Wallet with the appsheet guidance on connecting to Oracle cloud.
So, maybe this feature is just missing, in which case I am requesting it. Or maybe I just need more help in setting up such source/connection.