I'm worried this is getting too stretched, should I cut this back to encourage growth where I topped it?
It's my first grow and I am still learning, Should I provide more information?
Your plant looks pretty good. I’m guessing you want it to be bushier though. You could move your light closer to the plant. I’d push it to around 40 cm so that the smaller branches fill in the middle space. This will happen regardless when you switch to flower though, so no need to cut it back. Just move the light closer and switch to flower.