on a good day, i am able to do 300 to 350 normal pushups in a row, but with my fingertips, i can only do 12. But i do one handed one finger pushups (index on one hand).
If you need help going further in finger pushups, i maybe able to help you. I am able to do 12 one finger one handed pushups (index on one hand) and im only 17. I can tell you my routine for finger pushups, if you want to know.