It looks fine, let it grow into the container. When it looks obvious that it is trying to communicate something to you with its leaves, feed it. When you do decide to experiment with your bottled nutrients, do it in 1/4 strength to half strength and not in every watering and only after it has stretched if it keeps looking this healthy.
RIU has tons of feeding schedules posted by users in a similar boat as you. Check them out and give them a test.