Single moms..I need suggestions!!

Ma

I have been on my own since the pregnancy started. I have to possible fathers for my son and both of them haven’t been in the picture. Both have moved on with other women and neither have bothered to contact me at all. One told me to have a abortion (which there was no way in hell that was happening) and the other NEVER calls or has even helped!! I only had my sister and mom there when he was born and I signed the birth certificate because neither of them would show up. My son hasn’t had a father more like sperm donors here..I’m curious to know if I should continue the full custody of my son or let his dad be apart of his life: even through neither one will step up without papers and child support..What are my rights And has anyone ever been though this???