Hi@akhtar,
To create a Volume Group, you need to create Physical Volume first. After that, you can use vgcreate command to create one Volume Group. You can go through the below example.
[root@localhost ~]# vgcreate myvg /dev/sdb /dev/sdc
  Volume group "myvg" successfully created
[root@localhost ~]# vgdisplay myvg
  --- Volume group ---
  VG Name               myvg
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  1
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                0
  Open LV               0
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               59.99 GiB
  PE Size               4.00 MiB
  Total PE              15358
  Alloc PE / Size       0 / 0
  Free  PE / Size       15358 / 59.99 GiB
  VG UUID               AFeRlq-Uu1l-JkWp-5Dgh-DOfH-UCcH-eJbq1L
I hope this will give you some ideas.