[N-lightMike]

Yes, @OhWowMan , @Loraine is absolutely correct. Get that thumb down to the middle of the back of the neck and push your wrist forward. This will probably feel awkward at first, but it will give you the proper pressure and reach to make this chord easy… eventually. It takes time.

If your thumb slips, you are probably squeezing too hard. Power won’t make those strings ring out clearly. It’s technique that will do that. Experiment with moving your hand around, your wrist, elbow, and even your fingers. When you get it right, you will realize why children can play guitar. It doesn’t take that much pressure.

MG 😀