Hey! I’m new to growing (This is my third small batch) earlier in the veg stage

I went through nitrogen toxicity. and I’ve corrected that for the most part but…. i think I let these plants go too tall and grow with out topping. What should I do before sending these puppies into Flower. I’m 6 weeks into the grow. I’m about to lollipop. What’s some good advice to do before I switch my light to 12/12?
If you would like to slow the vertical growth you can use various techniques. Personally I use LST throughout but you can also super-crop the mains as well as topping. If you need more guidance, let me know. If you need personal and rapid response then hit me on IG.
Good growing 🌱🪴🤙🏻