as other replies allude it's also highly genre/goal dependant.
if you're trying to make your rock band sound more like led zeppelin there is a fairly fixed set of tools and instructions (albeit futile, ultimately)
if you are imagining a pure sound in your head that is not straightforwardly produced by an instrument, then it gets a lot more complicated, and there are countless routes to the same goal. the experimenting is the fun part though!
if you're trying to make your rock band sound more like led zeppelin there is a fairly fixed set of tools and instructions (albeit futile, ultimately)
if you are imagining a pure sound in your head that is not straightforwardly produced by an instrument, then it gets a lot more complicated, and there are countless routes to the same goal. the experimenting is the fun part though!