Not be up to it

Be more than one can handle / Have one's work cut out for oneself


Non essere pane per i propri denti


Meanings
To not be able to do something or deal with something by one's own strength

Examples
Forget about repairing the TV. Don't even try it! You are not up to it
Non tentare nemmeno di riparare la TV. Non è pane per i tuoi denti

Mark loves all water sports, but he admits that scuba diving is more than he can handle. He's just not up to it because he's afraid of deep waters
Marco ama tutti gli sport acquatici, ma ammette che le immersioni subacquee non sono pane per i suoi denti perché ha paura della profonditÃ