Here is good information on wells and pumps:
www.IrrigationTutorials.com by Jess Stryker.
I'm not a pro well man, just an old DIYer, but I've driven and plumbed my share of shallow wells.
Check with your local Health Department for shallow well guidance in your area. You will need a permit anyway.
Most shallow well pumps are good for 25' from the tip of the well point to the pump. Here, we get good water with "three joints and a point". Each joint is 5' galvanized 1.25" pipe threaded on both ends. The perforated well points come 3', 4', and 5'. I always go with the 5'.
You can wash it down or you can drive it down. Just make certain that the couplings are as tight as you can get them.
To drive a shallow well, you will need either a 6" 1.25" galvanized pipe nipple with couplings on both ends, or a Schedule 80 black heavy duty coupling, to drive with. Tighten it on as tight as you can get it, drive the sectiion, and then tighten a regular galvanized coupling on. Use several flat wraps of teflon tape wrapped clockwise only as the threaded end faces you for the final couplings.