Rewards are the end goal of every habit. The cue is about noticing the reward. The craving is about wanting the reward. The response is about obtaining the reward.
What is the reward you get from this new habit?
It is harder when the result of your habit is a long-term reward rather than a short-term reward.
Unfortunately, most healthy habits are long-term rewards, which is why they are harder to create.
This is why your motivation or craving for the reward needs to be high.