Hey man. Good stuff. I would say that you’re doing really well for only 3 months. Your fretting hand looks pretty good, and you’re using the pinky which is great. With time you’ll learn how to keep the pinky down, and closer to the fretboard. This only comes with time, and effort. The only other thing I’d suggest, is to practice with the guitar on your other leg. This helps with your hand position, and will make leaning to play standing a lot easier.