You could implement an exponential drive system. With the default joystick bindings, the control the robot’s speed linearly, but you can pass the values through an exponential function. This will make it to where if you slowly move the joysticks it is much easier to actually move slowly.
Guide to Exponential Drive Function
If it’s just driving that’s difficult, I found it helpful to lower the speed to something more comfortable and practice on that. Then slowly add 10% when the speeds become easier