You've just been told you are now immortal, how do you react?

First reaction would be disbelief, but then after I realize that I can't be injured anymore, I do whatever I want, but for the most time I will be learning, all languages and sciences. During my studies I will be traveling the world and start free soloing several mountains. Who needs planes or boats to cross an ocean, I'll just walk on the bottom and explore it, while I am there. After I studied everything I will try to figure out a propulsion method, that only requires power and no other fuel, build a rocket and explore the galaxy. Hopefully I will find other forms of life, if not it is time for the next galaxy. After exploring the universe I will probably settle down somewhere, maybe some place I came across my journey.