وَاعْبُدْ رَبَّكَ حَتَّىٰ يَأْتِيَكَ الْيَقِينُ (And serve thy Lord until there come unto thee the Hour that is Certain (your death).) Surat al Hijr, verse 99, Holy Quran.
Find something you are good at. If you can do something and are able to excel at it and have your achievements, you'll love it and you will be rewarded.
"It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; .. " Theodore Roosevelt, April 1910.
"What we know is not much. What we do not know is immense." Pierre Simon Laplace (1749 - 1827)