For a new person, they should make their position clear that they are experimenting and may only be able to take a limited dose. This you will find you can increase as you experience more sessions. You should not be caned with your trousers on, but wearing a thin pair of pants or knickers, if you have these on it is probably more painful than on a bare bottom.
I find that two types of cane are the best. School-type canes which are more flexible, give a considerable stinging experience and leave thin red lines. On the other hand, rattan canes are more bruising and leave red weals which take much longer to disappear.