Hi _OwO_!
For your ideas of "people/person being rejected from society" and the censorship of information, as angelina_naguen said,
Ai Wei Wei's artworks and concepts work perfectly with your theme.
In addition to the artworks suggested by Angelina, I reccomend looking at his works
"Study of Perspective", in particular "Tiananmen Square" which illustrates the ability of the artist to act as an activist, with Wei Wei defying the Chinese government and resulting in his labelling as a “threat to harmonious society” and time under house arrest, drawing parallels with your theme of rejection from society. This work expresses his attitude of contempt towards state power and cynically opposes the Beijing government’s censorship of the media and refusal to discuss the Tiananmen Square massacre, ideas which you could explore in detail.
Another one of Wei Wei's works, if you really wanted to explicitly focus on "light" symbolism, would be
"Chandelier", a restored Han dynasty lamp installation at the National Gallery of Victoria in Melbourne. I saw this work there around 2 years ago and it is incredible! For this, you could discuss themes of the Chinese cultural revolution, this work, through light symbolism, reflecting on the future of Chinese culture and tradition by subverting and remaking a traditional piece in a modern framework, the lights symbolising the hope and future for China even though a dictatorship prevails there.
Another artist who would work really well with your ideas is
Kurt Schwitters, a German dada artist from the 1920s. Schwitter's works reflect the shifting economic and military paradigms of post-war Germany and the Weimar era, his works, in particular
"Picture of Spatial Growths" encapsulating societal materialism, loss of culture, increasing materialism, censorship by the Nazi government and the rejection of "degenerate" artists from German society. You could relate these themes to your ideas of censorship and focus on WW2.
I used both Wei Wei and Schwitters in my essay in my HSC exam and they are two artists with very profound and in-depth themes which you will be able to really study in detail!
Hope that this can be helpful, good luck!!
(and if you need any more info on Wei Wei or Schwitters then feel free to message me!)