Being a beginner, sanitization is going to be the most challenging piece to get comfortable with. Skip rehydration or yeast starters until you've become more familiar with the entire process. Rehydration just adds more places to screw up sanitization.
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THats true and could be a reason probably why they just say pitch dry, to make it easy and appealing for a beginner to simplify things. Granted it does work. Instructions on liquid vials also tell you how to pitch (kind of) but they dont tell you of the importance of aerating your wort first and things like that. Certain things and techniques you just have to learn on your own by researchig/reading.