Codes

I dont know and cant learn HTML HELPPP do you guys have ready codes? Like.. i wanna change my layout but i dont know which one is the layout actually.. 

Can you guys like send codes and...

Can you tell me which code does what? For example, put the code for the background and write 'put the link here' so that I can put the link of the photo there BECAUSE I DON'T UNDERSTAND😭😖