which course(from home/in nagpur city/from internet) should i join during my BE comp. sci. i've completed my 2nd year

i am doing engg. in nagpur. i want to learn many good things in comp. sci. I know c, c++ and little bit java which i am learning online. please suggest me some course which can be done in nagpur or from internet or (in other cities in 1 month vacations which i would be getting in November)