I found a solution that works perfectly for me.
As some may know I spend a good few summer days Rudd fishing on an enormous lake which has huge shoals that come and go in various swims, when you get them you want to keep them there as long as possble and the pellet waggler method whether with a whip or rod and line if the carp move in can provide tremendous sport.
Like the op I’m hopeless with a catty and it took me a while but eventually found the perfect tool for the job, a plastic scoop.
I place a bait bucket in front of me tilted at a 45 degree angle and fill it with pellets, I can then scoop out as many or little pellets one handed whilst still fishing with the other hand. I can get good distance and accuracy.
I was given a tip by a local, start off by throwing in a scoop of gravel off the ground instead of pellets, theory being, the increased splash as the gravel lands attracts the Rudd from far away, I do believe it works!