A few questions from a new user!

Question 1: am I able to make a website editable?
→ Like edit the headlines, other text, images, if so, please link me some kind of tutorial.

Question 2: Could this be possible on wordpress.com? The website I am building is for someone that uses wordpress.com as their hosting, again if so, please link me with some kind of tutorial or blog post where I learn about this.

Question 3: Is this all possible on the same domain, or do I really need to host the actual website on some other hosting? Or can this all be done just with wordpress.com?

Please let me know!
Thanks in advance.

Whatever content u update on Wordpress, that same content will be shown on Frontity.
Obviously, you need domain and Node hosting provider