How does it work

I'm a 45 year old male father of 2 girls and I don't want to get the vaccine to them because I don't know anything about it. If the education was increased on how the mechanism works maybe I would be willing To get the vaccine. But until knowledge is passed on to the general public about the side effects and anything that might be hiding in the shadows I can't get it and I won't give it to my children. So I'm asking you to please teach people and me how it works and what it does in a long term side effect possibility.