How can i improve my heandgrip strength?

Hi, I'm a guy who works out at the gym. I weigh 85 kg, but I have a very weak grip. Even weaker than some girls (I can't even close a 50 kg handlebar). When I encountered this problem, my world fell apart. So I'd like to dedicate myself entirely to developing hand strength, even at the expense of losing considerable mass and volume in other muscle groups. Because, heck, I'm a man and I want a very strong grip, but I don't know where to start.