It can definitely be difficult because the movements on the rein are different-I’m referring to a bitless bridle rather than a hackamore. @equiisass is right, be patient in learning to adapt, keeping in mind to find the most efficient way to communicate with your horse.
Yes, this isn’t uncommon. Bits and Hackamores are two very different things. In my experiences, taking it slow and easing into it is the simplest way to switch. Over time, it’ll become simple to switch between the two