This is the great place to be to find out how to practice what you have been learning on sap hana so far. The wonderful thing is that you can do it as long as you need to.
There are 2 options available. One is to download and install a totaly free sap hana edition. However to do so your PC has to be fitted with enough memory so that Sap Hana express edition and the virtual environment work adequately. The second one is to use web cloud server. That option has a cost and it is more orientated for development work on Sap Hana rather than administration and operation exercices.