Soley nursing

Kayla
I am 10 days PP and I have been mainly pumping and nursing 1x a day. I was originally not keen on BF bc it was so difficult to start, I have not used any supplements but I have fallen in love with the idea that my body can provide for my baby and how personal it is. So I have decided to soley nurse.
Is this possible? 
How will I know if baby has had enough? 
What are some challenges w/ only nursing?