Hi hassanbhai7771,
Thanks for the interest to use our Theme. Switching the Theme is very easy. You can do it from “Appearance > Theme” then click on ‘Add New’ on top and search for “NewsCard” on search field. After finding the ‘NewsCard’ on list click ‘Install’ then click on ‘Activate’.
Switching The Theme won’t loose your Posts and Pages of your Site. Only the customizer option and setting will be different for every themes so after switching the Theme you need to set the setting and option.
You can check our the Documentation and Instruction for help.
also you can get help from our ‘Video Tutorial’ to set ‘Front Page Template’.
Please let us know if you have any queries about the Theme.
Thanks