My first time donating was in college at the age of 18. It was scary but the volunteers were supportive and gave me comfort and snacks. Who doesn't like free snacks!
I am now 57 and continue to give blood when I can because I can in the different states the I have lived. I have friends, family and neighbors that aren't able to donate because of their medications or health issues so it's an easy thing for me to do and it's a win/win. The incentives are a nice bonus!