It is pretty interesting.
Contrary to what most answers might be or you’ll get here , it is possible but like anything else it must be dealt with in balance and proper perspective. You’re at an excellent age to start learning about such things and it should come pretty easy to you if you take the time to learn how with good instructions. Just don’t get stupid about it. You are being warned.
You might find reading Chapter 41 from The Anointed, The Elect, and The Damned helpful towards that end. While the chapter isn’t specifically about opening the 3rd eye, some of the strategies mentioned can help you do it. IF you decide to pursue, make sure you pay STRICT ATTENTION to all the warnings. Again, you are being warned. Don’t get stupid.