Saying you're using "well water" really doesn't mean much at all in terms of water quality. In some locations well water is great, in some, not so much.
The place to start is a suite of tests on your well water. Our's are done through a lab, and run $80. Includes about 44 analytes. This is what's needed before you invest in something running $500 to $1,000 (or more). Be scared of anyone that wants to sell you whole house water treatment equipment (e.g., a softener) without testing the water. And no, a test for water hardness is not sufficient.
In terms of water pressure, well pumps are typically controller by a pressure switch. They are usually set at 30/50 or 40/60 - meaning they turn the pump on when pressure in the well tank reaches 30 (or 40) psi, and they turn the pump off when the pressure in the tank reads 50 (or 60) psi. Both set points (the low pressure/turn on; and the high pressure/turn off) on the pressure switch are adjustable.
Russ