Now that you know how to hold the violin, the bow and know how to draw the bow across the strings, you can learn how to place the finger down correctly on the G.
It’s important to put your fingers down the right way from the very beginning in order to simplify more accurate intonation, sound quality and vibrato later in your violin learning process.
Keep the finger curved at all times. Apply slightly more pressure on the left side of your finger. Use your ears at all times. Your ears will often tell you what you are doing wrong if you experiment. Applying too little pressure will give a bad sound and too much will hurt you. Be very diligent in fixing your intonation. GOOD LUCK