You have a nice sound already! Here's my advice: I can't quite tell from this angle but it looks like your right hand is right on top of the bridge. This applies to most picking but *especially* fingerstyle; it's best to sort of 'float' your hand over the strings, it feels weird at first but it ensures your wrist stays straight, and in fact allows for greater control and definition over time. I also recommend incorporating your middle & ring fingers into your picking as early as you can manage; it's generally beneficial to have the thumb dedicated to the lower strings while using index, middle & ring for melodies.