How to use Kali Linux 2021 after installing for beginners

Can we have windows and kali Linux at the same time

mine says the command takes no arguments

What is the diffrence between Root terminal and normal terminal (Root@kali vs kali@kali) (# vs $) ?

Great!

good for first timers - few simple introductions exist. Helps those who are trying to start. Nice simple introduction for beginners

update video ?

The screen capture that you're using is such poor quality that we can't copy the commands or view easily

Hello I tried the update and upgrade command and it did it but at the end it brought up a message that said the grub was not installed. Do you happen to know what this means?

can you teach step by step on how to use the tools am a student trying to learn more maybe make a course on how to use them step by step ther pros and cons