First Time Grower - need advice

I always wait until week 3

Sounds like you rushed into it a bit. Make sure you have all you need to begin the grow before beginning the grow 😂 For the first 2-3 weeks you shouldn't need nutes but in coco so might have to add them sooner. If you haven't already, I strongly recommend reading up on coco growing and beginners guide to growing cannabis. There is alot of equipment you need or might want to have and there is alot that can go wrong along the way, best to understand this fully before beginning. I'm always reading. 👍🌱