Leaves turning Kind of yellowish

dude there is no problem at all dont worry. older leaves will get eaten as plant grow more and more young leaves and branches its normal. try to research about mobile and immobile nutrients . there are some nuts that will freely move into different parts of plants that called mobile nutrients and on the other hand there are nuts that cant move freely and easily as mobile ones .you can put it this way like they will first come and sit into lower parts of plant then go slowly to the upper parts as new branches will grow and that s the way of plants for moving these nuts by cannibalizing these excess nuts that are stored there and always immobile nutrients are at over dose in lower leaves and are under dose in new and top leaves . so just remove the older leaves as they get a little yellower and dont worry at all.

My noob guess is overfeeding. If you took the plant to natural light and posted better pictures the pro’s might be more inclined to answer.