We cannot conclude blindly that any branch is cool and easy to study because each branch is having some complexity in their fields
As per now current trends many people are thinking that C.S. & I.T, are the cool branches to study but it is not so, if we are passionate about our goals then each branch is having equal weight.
There is no such thing called as easiest branch of engineering. It always depends on your interest and your ability to manage the academics. As such there is nothing tough in this world. There is only one thing that make things tough is your lack of interest.
Off course you need certain amount of basic skills and proper guidance to make anything more interesting. Good mathematics and analytical skills are very basic for any engineering branch. If you are not an analytical person then branches like computer science, IT may be tough for you. Here are few suggestions for you to make things easy and more interesting:
First find your area of interest.
Choose engineering branch according to your interest.
Get good books and mentors to make it less boring and more interesting.