I may have time later to give more information on scanners but this will have to do. I am sure there are more articles available for which digital scanners to buy.
First: get off of Amazon. Not only are you overpaying for equipment, you are supporting the enemy.
Take some time and see which scanner you need. The prices have gone up.
Third: Anyone recommending using a Baofeng to transmit will get what they deserve. Which is unsecured comms leading to easy triangulation and targeting. The military can locate a Baofeng transmission within 2 seconds. Is your family’s life worth $30 for a radio made in China? There is a reason the military calls these units missile magnets.
Fourth: Do the research on the unit you will purchase for scanning. Get any associated programming software, earsets if necessary, chargers and batteries.
Fifth: There will be a learning curve.