No Water or Low Pressure how to fix it & diagnose the issue. Well pump not pumping

Links to Common Water Well System Products
20 Gallon Bladder Tank amzn.to/3AarHhX
40/60 Pressure Switch amzn.to/3QyJMeO
Brass Tank T Manifold Kit amzn.to/3p89gUY
1/2 Hp 240v Pump 150ft Max Pumping Depth amzn.to/3zGY3iZ
Rubber Tape for Wire amzn.to/3vSR1GI
Wire Splice Kit amzn.to/3A7U68q