[Fetish] First time with wife with foot fetish???

So I have explained to my wife I have a foot fetish, she is ok with it and actually enjoys the fact I like her feet. The question is how do I go about our first foot fetish experience? I want to worship her feet kiss and lick them, how should I go about doing it? I don't even know how to start or how to finish? I'm currently on nofap so I can't watch porn for ideas!

TL;DR: How to do first foot worship experience in bedroom?