I did my 3 young gooseberries in autumn. The legs were far too short so they are now a good 6-8 inches and I have pruned to try and get a good `bowl` shape. It is very early days though and I pruned so hard that I am not expecting any fruit yet. They have only been in a year and I waited for the roots to get a bit established
Are tayberries like blackberries? If so, my two grow on wires and I tie in all new shoots to make a zig zag shape on either side of centre. New shoots will be trained to left and right along the top wire. Old fruited shoots will be cut off next autumn and the horizontal shoots will then be zig zagged
I would do it now if not done