6 months handstand practice with no progress

I've been practicing chest to wall and back to wall handstand consistently for over half a year and made absolutely no progress. I'm trying my best to keep my body straight. when I underbalance, I push down and release pressure from my fingertips. When I overbalace and push down with my fingertips. The way i practice is I get into the handstand position with the assistance of the wall and then slowly stop touching it with my feet and try to balance. I've been doing this for over half a year and don't see any improvements besides getting very comfortable in being upside down and increasing my max handstand time but I still can't balance the handstand for more than like 4 seconds. I'm very frustrated and need help