Donating blood for the first time

Yesterday marked the first time I donated blood to someone, not just a random person but my friend who unfortunately has been facing some health challenges. I was at a friend's house when I got a call about the urgent demand for blood transfusion to help in the treatment of my friend at the hospital where he was admitted. I haven't done that before so I needed to convince my heart to take that step, I found out that it will only prove that I do care for my friend and humanity above just the surface to do this sacrifice for him.