The following diagram and notation show all the notes you have learned so far. Play through them, naming each one out loud as you go. Once you can do this easily, try doing the same again, but with your eyes closed.
Remember that all the notes on the bass strings (4th, 5th and 6th strings) are played with p, while the notes on the treble strings (1st, 2nd and 3rd strings) are played with the fingers. When you come to the note G on the 3rd string, simply switch from p to i and m and begin using rest stroke.