How do you deal with negativity and pessimism ?

I just started a photojournalism project and I cannot for the life of me get it right. It is on child labourers in Mumbai and I want to give them their agency back but I cannot find my subjects, even if I do, my framing is fuck all. Now every time I step out of the house, I have to battle this barrage of negative thoughts that I will come empty handed once again. How do I deal with this?