HELP! Yellowish leafs

[lambdacapa]

Hello, this is my first ever grow and wanted some help. Is it normal it's so yellow at the centre? I'm growing in Coco coir and giving full nutrients. Also, how do I regulate properly light? Thanks in advance

 

[GRIMM]

Though I've been at it for a couple years now I'm still a novice. I have found these links EXTREMELY valuable.
https://www.growweedeasy.com/marijuana-symptoms
https://www.growweedeasy.com/7-tips-growing-weed

Chin up! You will figure it out
GRIMM