For now, it is safe to use products that do not contain nicotine. Moreover, it is generally believed that products without nicotine are healthier than products containing nicotine, but the long-term impact remains to be verified.
In summary, if you are looking to gradually get rid of nicotine, you can slowly reduce the amount of nicotine you use. Or start with cross use. I do not recommend that you switch immediately, it will not benefit you. Whether to use it is all up to your choice.