I do knit and I do crochet. And always have. I could not imagine one without the other.
But my knitting is WAY beyond any of my crochet skills.
Knitters probably need crochet more than the other way around, but it is so handy to know both.
Knitting is not all that hard. And you have the great advantage to already do a yarn craft - you know about the materials, attitudes of yarn, and handling. And both things just loop sting (differently, yes).
Once you get the hang of it, you will be soooo happy with your diversity. Keep on practicing!