Since you learned the notes on the A string and the D string, now you are ready to learn the notes on the G string. 🙂
On both the A string and the D string, we place our fingers as below:
The 1st finger on the line, the 2nd finger is right next to the the first finger, the 3rd finger on the line, the 4th finger and the 3rd are one whole step apart (not right next to each other).
On the G string. we place our fingers differently.
The 1st finger on the line, the 2nd finger is right next to the the 3rd finger, the 3rd finger on the line, the 4th finger and the 3rd finger are one whole step apart.
You may feel the G string is far, so you will pivot your elbow inward and help your hand with your whole arm. Your left hand base joint is higher than when you play on the A string or the D string.
Your elbow moves inward (toward your right), outward (toward your left), according to which string your left hand will be.
You can practice swinging your arm; your elbow inward, outward, in, out… 🙂
You will practice the following music:
ONLY after you feel comfortable playing the exercise above, you can try starting from the 4th finger as below. :