I don like some letters in the font, eg “melika Sa”. What can I do to change it?
Nothing much, unless you know how to use Metafont program. If you are motivated to redesign a few letters yourself using metafont, you should first obtain the whole TeluguTeX package, which is in the public domain (anonymous ftp address: 128.95.200.1, in pub/tex/telugu/). We have included only one font file of TeluguTeX, and not included its Metafont code. You should get the Metafont files and edit them yourself.