2 ways to look at it. If you are happy just flying around, go for it as is.
If you want to do acrobatics in the future and really fly in windy conditions, start learning to use rudder. First, feel comfortable flying the plane so you can put it where you want it to go. To add rudder, go up three crash heights to start practicing using rudder.
In simple fact, if you add flying upside down, can do a knife edge and a good slow roll(using the rudder when needed), you can do anything including 3D. Another thought is if you want to fly a bipe, rudder makes it so easy.