I'd recommend beginning around 20 weeks. Until then, focus on exposing your kitten to lots of different stimuli, including different types of people, groups of people, car rides, dogs (basically anything she'll experience in life with you) and associating those things with positive reinforcement in the form of affection and treats. That will help her to be less fearful moving forward.
I’ve been trying to clicker train my cat to come to me when I call for our walks but he doesn’t move even with treats what should I do? He doesn’t like most treats or gets bored of them fast
It may take finding that special treat that truly motivates him. Have you tried tube treats? I have a video on those and they work great for clicker training!
