I hope you are well today and thank you for your questions.
Both of these things are possible by creating child theme of Sparkling theme and developing custom code in it.
Developing custom code for custom functionality is beyond the scope of support that we provide here.
If you are not a developer then you can consider hiring a developer to develop it for you. You can hire a developer from any freelance site. Colorlib recommends the developer https://www.upwork.com/freelancers/~011652ffec8865c6d5