layout decorating gone wrong

damn i spend around 3 years on programming lecture specialisizing CSS code just to remember nothing and have no single idea how do i customisizing my spacehey...

i've tried a bunch of layout template by everyone else in spacehey but ended up i dont understand how to put a song to autoplay when i see my profile, 

i also try this website called https://tommypanzram.neocities.org but yeah, 3 years of nonsense