Hi aryan82. I am also new to android. I may not completely fix your problem but i am just trying to give you a solution.
Go to settings < wireless and networks settings < mobile networks < Click on Use Packet Data.
Next open Access point names there. If you dont find any access point name like mobileoffice(for airtel), airtel live(for airtel), bsnl gprs south(for cellone,bsnl), then there are no settings provided to your phone by your network provider.
As there are no settings provided there, call your customer care and ask to send gprs settings for your Samsung Galaxy Ace.
After receiving settings, select a network operator in Network Operator Menu there.
This may solve your Problem.