Where is the safest place on my thigh to cut?

As you can see, i js cut in the middle of my thigh and this is the most painful cut I think I’ve ever had. I cut super shallow and I rly wanna cut deeper, but I don’t wanna severely damage any important nerves or veins, bc ik that nerves r located in dermis. It hurts so bad and the area around it is kinda numb. I wanna cut deep dermis but I wanna do somewhere where there’s fewer nerves so it hurts less. Ok ty pls lmk.