For learn Tally.ERP9 you need a computer and Tally.ERP9 software of course. If you don't have original version, you can download Tally.ERP9 Educational Version from www.tallysolutions.com There are some limitations in the Education Version such as vouchers can be entered only first, second or last date of the month and some reports are also not viewable.
After download the file, make complete setup in your computer.
For opening your Tally press on Start>All Program>Tally.ERP9>Tally.ERP9.exe or simply you can click on Tally.ERP9 Icon from Desktop. Firstly you will see Startup Window as given below. Select Single User or Multi-User Mode to work in educational mode.