Third shot drop is ruining my life - how long did it actually take you to get consistent?

I understand the mechanics. I watch the videos. I drill it. Then I get into a real game and it goes into the net or flies long every single time. Been playing about four months, around 3.0 level. Starting to wonder if I'm gripping too tight under pressure or if it's just a reps thing.

How long before it started clicking for you and what finally made it stick?