This article “How to enable Language in Computer?” which is available at http://www.rajbhasha.gov.in/unicodesolutioneng.pdf is really good. Very basic steps and anyone can easily follow it.
It talk about Unicode enabling on Computer to avoid font related problems to display documents/ web-pages, send & receive e-mails, etc. in Hindi
I found this link at http://www.rajbhasha.gov.in. Which also teach you Hindi for free.