Dear Shiva ,

There are so many types of courses are available in  specialization of Ethical hacking in diploma ,certificate course and many more. If you  wants to only for the learning purpose then you must go through online certificate courses are available and some of course are free you can try this one for earlier or beginare level then after go for btech course then you will broadly know about different programming languages,networking ,data base ,ethical hacking ,operating system and many mores .This all above mentioned subjects are directly connected with ethical hacking or we can say that without this things you will not able to know the ethical hacking .

Hope it will helpful

Thanks