What soil are you using? What type of CFL’s? You can get good grow CFL lights from hydroponic stores that generate more output.
You definitely have fert burn. I’m hoping your not using a soil with a slow release fertilizer. It looks ok. When I first started I didn’t bother with any scrog,topping methods I just wanted to get familiar with the basics. When you do these methods you have to factor in what you’ve done when your see a problem arise with your plant, and if your inexperienced it can be difficult.
My advice. Stick to the basics. Mix your own soil. Add lots of perlite and worm castings. Good to go.