am i really ready to be a nurse?

i was walking towards long john from bugis village today when i saw this old man (arnd 60 yrs old) lying beside the road. his head was bleeding quite badly. from what i've heard, he tripped over the uneven waffle lookalike pavement on the grass and fell down.

other than asking the ppl arnd whether they have called for ambulance, at that moment, i really didnt know what i could do to help. am i really ready to be a nurse?