Don't be so sensitive.
If you are new to growing and I'm assuming you are due to the question, you should not worry about LST, just do the most basic grow you can do, you willlearn much more this way than tying hundreds of strings to your plant when you don't even know what the PH run off of your soil is, or how much PPM you nute solution is going to be, or when you will cull the males and keep the females.