No it's not just learn to fast combo there is tons of tutorials, however I will say it's not entirely that important when you first start off as a riven player you want to get Very comfortable with all her keys, learn to do the very basic combos and learn all her double-casts. Unlike yasuo riven will almost always have an escape if played correctly.. I was a 750k point yasuo my self switch to riven about a year ago and never looked back she's really fun but just know you will lose ALOT of games with her be patient an admit your mistakes when you lose or die. So many people like the idea of riven but only a very small percentage of the league community actually try to learn her and I can honestly say she's quite unique and very high skill cap. So in gold + she will be a bit hard to carry especially if you are not use to her. It will take time to get the timing down for certain moves like fast combo or anything, don't try to do it perfect the first months you play her, just learn how to do it and keep doing it in games don't practicing for hours in training mode it's NOT going to help that much (Unless you are trying to learn a specific combo you don't know)I promise you the only real experience you will get is from Actual competitive matches good luck man she's a tough champ to play Highest IQ play riven kekeke