Everyone always tells you to go out of your comfort zone or to think outside of the box, but we never (at least me) never really take that phrase to seriously and we keep doing our usual thing.
Have ever though about the benefits of pushing your limits? We never think of that, we never do it, we think is too dangerous, we are not used to say yes, we hide inside our little box and stay in our little world.
There are even times where we forget that there's a lot to see, that the world doesn't ends with us, we tend to think that we saw everything that we needed to see and it's not true but also puts you in a position where not only you stay where you are but you  stop growing as a person.
Sometimes we say no out of fear, pushing our limits every time is beneficial for you in more than one way, I know that sometimes it can be really hard to say yes but think it twice and really put your options right there, you get one life, you get some amazing chances, it's your choice to take them or not.
Take one step at the time, keep your goal in mind and never do anything that is going to put you in danger. When you start seeing that it's actually good for you, you be thankful that you did it.