one of the best places to start is to compare the evidence this is a spinning ball, and check the sources, and think about if they are observable, testable, repeatable natural science experiments that you can check yourself of if you have to take them from authority. Then google 200 proofs earh is not a spinning ball and try and prove each of these wrond, how many are natural observable, testable repeatable etc... just so cool that you truly have an open mind... I was very closed minded to this two years ago, now I can no longer see the earth as a sphere : ))) I know that sounds wild, but I wouldn't say it if I hadn't observed the evidence