If you believe, then you have already taken the first step towards your achievement.
Look around and find something for which to be grateful.
Study is a life long pursuit.
If you are not comortable to deal with an opponent 50 lbs heavier than you, there is something wrong with your Jiu Jitsu.
Self-defence, self-confidence, discipline and self control. The values you learn are priceless.
In life, when presented with any situation, breathe, take your time, focus and then decide what to do.