@yukinoh1989 You set the energy higher:

You can also change the type of light, each one has different features. Also, did you know you can add more lights? Just like you add a new mesh, hit SHIFT + A but then go to the lights section.
Also you can turn up your world lighting a bit by picking a lighter color:

Using a HDRI is usualy the best way to light a scene, like @thecabbagedetective explained before, but this will give you some great options to try out for now. Hope this helps 😊