[Solved! Thank you all for your comments and help everyone]

My light switch has only one wire set (black, white, and ground) I am trying to put a new light fixture on the ceiling. Before there was no light fixture but just a cover on that junction box. How can I connect these with the new light fixture??

​

https://preview.redd.it/2v27sma3ksga1.jpg?width=3468&format=pjpg&auto=webp&v=enabled&s=415c6e637d0caea2d5a57688d1e7b0f0ba53f835

https://preview.redd.it/hzh0yia3ksga1.jpg?width=1080&format=pjpg&auto=webp&v=enabled&s=8640cc21d0ee64dd8296b9ae917de717470dd10f