How do you play Vayne well?
Been trying to expand my ADC champ pool so I've turned to Vayne which I seemingly suck with so I want some pointers on how to play her effectively. It seems like if I make any mistakes or have a support who makes any mistakes I fall behind the other ADC and can never catch up because I do so little damage without items and have no wave clear to farm quickly.
So general questions: do you max Tumble or Silver Bolts first? How do you effectively catch up if you fall behind as Vayne? Bork or IE first? What are other points that are essential to playing Vayne well other than positioning well to get Condemn stuns off?
I'm just looking for anything because I'm usually not horrible with champions other than Draven and it's frustrating that I play Vayne like shit.