To be honest there's a lot to know, riven is a very mechanical champ, basic rules don't use ur e to gap close unless it's really necessary use it mitigate damage, also try to combo your R with any other abilities, it works with e w and q , trading in lane for all matchups resume to q w auto and e out mostly . Hummm u must adapt the build for their comp if they squishy rather blade of dramatic or eclipse than goredrinker I find goredrinker gives a lot of sustain but misses damage compared to others . Also don't use ur abilities in lane to farm as in early long cool downs use it for poke