Good luck on your first grow!! The yellow on the leaves can be a sign of ph issue, it may be too high or too low - I would check your ph and aim for 6-6.5ph 😊
On Agrikola? Seriously? Respect and Respect!!!! Bro, check out Dja, there's a recipe for a three-component setup for cheap, what light? I see a phyto lamp, probably another Chinese LED without a driver? I'll keep an eye on it.