First Time Growing...Any Advice?

Hey guys, my first post in here

it’s my first time growing and I wanted to get feedback on setup and how plants look so far.

I started LST on my plants already so they grow out and not up.

Strain: Gelato
Age: 3 weeks 6 days
Light: 1800w by UpDayDay
Fan: 2, 4inch isolating fans
Grow tent: 60x60x150cm
Filter: 4inch carbon filter with fan intake

Average temp: 78F
Average humidity: 50

only been feeding 6.2 ph water as well as a Dr. Earth all purpose soil.

Edit: what nutrients should I be adding to my watering? And when? I’ve only added correct PH water and let the organic soil do most of the work. How should I measure what I need? How do I know what nutrients I need to add?

Any tips or advice is much appreciated

My advice is to not overfeed. Many growers start out with nice looking plants and then think dumping a bunch of products on their plants is the ticket to big yields. Often what happens are plants that end up unhealthy.