Heros!!! I really

Hello Heros!!! I really need yalls help… i just set up multisite and i am so confused on how to get it working properly…. i set it up for not the sub domain but multisite for files… Everytime i try to create a new site such as political-meme-generator for example so i can have a custom meme generator with the generator having its own photos dedicated to that particular multisite… i really want the websites to look the same but the only difference would be the meme generator would be customized solely for each individual site on the multi site… please help?