you’re on 12/12 lighting - that’s flower.
If you want the plant to grow larger (veg) you want 18/6 or 24/0 lighting. At 12/12 you’re flowering (bud production)
For nutrients, super simple = gh Lucas formula. (5ml micro + 5ml bloom + calmag). Super cheap.
For lighting try to get up to 250-300W (Real watt from wall) not the “watts” the lights on amazon say in the title (which is significantly less than advertised.) I’d look at local listings on Facebook for a cheap, quality led grow light.