Selfish question here: can one actually screen reliably for most cancers from age 40 to say 60 and actually do something about it? That is say, do as complete

Selfish question here: can one actually screen reliably for most cancers from age 40 to say 60 and actually do something about it? That is say, do as complete as possible cancer screening every 3 months? The worst seem to be the ones like pancreatic cancer, you have a very little chance of catching it before it has spread. I just want to see my daughters grow up that is all.