Trying to get into the App model from SP. I created as SP hosted app, published it on SP online. My app created successfully a list in the app web with some items. Now I want to have have a look at the list. How do I can see this list on the appweb?
The purpose off the app web is to store data used by your code logic. Lists created here are not intended to be seen by end-users. End-users will however interact with these data through App part you developed that use JSOM to get/set data into these lists.
You can still consult them for debug purposes by browsing their direct URLs or by PowerShell on your dev machine.