Acer Chromebook 311 C722 - Mediatek 8183, 4gb Ram, 32gb And Calibre

Hello i installed Calibre on my chromebook by using sudo apt install calibre but it is version 3.39.1 and i need version 5.23
when i go to the calibre website and copy and paste to install calibre it asks for a root password and i dont have one,i tried my password i use to login to chromebook but it does not like it.
the problem is when i connect my kindle it does not see it.
does anyone please know how i can bet version 5.23 of calibre on my chromebook without asking for a root password please?
thank you.