Hi, I know it is easy to ask and wait. I recommend to do more searching for info in the page. You can find many instructions and guides. Like: GVM 21.04 - Kali Linux
If you have difficulty in getting GVM running it indicates that you need more time to learn how linux internals work. I do not recommend to use something you do not understand. Learning is fun.
You can start from trial and then move to build yourself method Setting Up the Greenbone Security Manager TRIAL (GSM TRIAL) Virtual Machine