If you have small children or pets. You will have to decide get cordless roller blinds. Cordless blinds are suitable for environments with young children and pets. The motorized roller blinds is your best choice.
Yes, you can, There are options to install both or any one simultaneously. Double Layer roller blinds is including sunscreen and blackout fabric in one roller blinds, also is a nice choice.
Roller blind has 2 types sunscreen, Blackout. A sunscreen Roller Blind has Light Filtering, Blackout Roller Blinds will block the Light in a particular room.