Well if you are using Red Hat Enterprise Linux Server 7.2 then it good to go.
If you are using some other os then there are two ways you can use RHEL7.2 --
- You can either install a fresh rhel7.2 os from cd or bootable pendrive.
- You can also run it in virtual machine or KVM or virtualbox as you like.
Note- Any damage to your computer or data inside it will be your resposibility!
You must give an appropriate amount of memory to boot block,/,and also save some for partitioning.
Get help from your teacher or friend who has knowledge of linux.
If you have any difficulty in installing rhel7.2 you can ask it in comments.
Installing rhel for first time if you are new to linux can be complex if you want to save your data in case of dual boot.
But you can always install it in virtual box, so you don't mess up your pc.
Installing redhat is the most complex thing you will do in this course as you can be on any machine with any os and i can not explain all types of method as there is no common method.
Get help from internet to install rhel7.2 specific to your pc.
Once you successfully install rhel7.2 you are all set.