It is advised that growers trim the lower branches off causing the plant to focus on the tops (which are the ones getting all the sun). You could clean up the bottom a bit if you like, but your plant isnt that big. Are you growing this indoor or outdoor?

Also, maybe you just watered, but it looks like your soil is waaay too wet and a little light on the perlite. With soil, you want a lot of perlite to help aerate the soil and create better drainage.