Have a look here.
Chastity Play / Experiment - Sex Tips & Talk - Lovehoney (lovehoneyforum.com)
Assuming your partner is willing to go along with this it will take time and communication to build up the sort of relationship you are looking for. In the early days (weeks) you may well have to still be the one making the suggestions as to what she can do to you, or with you, but hopefully, once they catch on and start to enjoy the control the will naturally take over. we’ve been doing this (caged) for 9 months now and my wife is just starting to exercise full control.