Most people start feeding around the end of Week 3. If your using decent soil, it will have enough nutrients for the plant to survive until then. Hopefully, I answered your question and remember " Happy Growing and Free your mind one puff at a time ".
Those look very over watered.
What’s in the soil? I personally don’t use nutrients until like week 4-5 because I use a supersoil.
You can start with a very diluted solution at about 2-3 weeks.