Hi @masum welcome to the Fedora community!
If you’ve not had a chance yet, please look at the #start-here category. It has some very useful information on using the forum and tips on Fedora usage.
I see you want to unmount your /home partition … 
uh wait!!!
Why would you want to do that? You need your /home partition.
sir,i can’t use my home partition but i want use home partition
Describe what you really want to do. In the end, you may not need to unmount /home
my hard disk is 500 GB i create 94 GB root,8GB swap,500 MB boot,and other space for home partition sothat i save my data in home partition but i can’t use home partition
Is that screenshot from a fully installed Fedora? If so, how about we take this gradually? Can you open the terminal (gnome-terminal)?
What does the terminal show you?
Mine says something like:
[twohot@pc.somewhere.com ~] $
What do you see?
Welcome @masum
Could you elaborate what exactly you mean by that? Your home partition is already in use, that’s why you can"t unmount it. Issue a ls -la ~ and you will see what’s on there…
I’m a new user in fedora.i can’t understand properly how to install fedora,please tell me how to install fedora,my hard disk 500GB tell me about disk partition
So you have not installed Fedora on your machine then?
Is this screenshot from your machine?
If that screenshot was from your machine, then you had installed Fedora
Perhaps you wanted to do it differently.
Did you have another OS on the machine? Perhaps “Windows”?
Do you want only Fedora on the machine?
No sir i had no other os,i want install fedora again properly,can you help me?
Is this install guide maybe helpful to you: https://docs.fedoraproject.org/en-US/fedora/f32/install-guide/install/Preparing_for_Installation/?