This summer I didn't have enough pressure to run a sprinkler, wouldn't turn or oscilate. Now I don't have enough pressure to run the bathroom shower. I have my own well and don't know much about it or where to find imformation on well's, pressure tanks. and proper pressure adjustments

 

Rick,
You just found it (D-I-Y.com).
Your well/pump pressure can be affected by a number of things.
The first, and usually the most likely suspect, is the air pressure tank. It's air pressure should be at or near your pump cut-on pressure (30 lbs or so). Check the pressure in your air tank with a tire pressure gauge. Add air with a bicycle pump, portable air tank or compressor, if necessary. (Check this every month or two. They can get "water-logged", and I'm guessing that this is your main problem, if it hasn't had any attention.)
You also should have a pressure switch on the pump or tank (small plastic cover on it with wiring into it). It will always stop when it reaches max pressure. You can adjust the pressure up by turning the spring-loaded nut(s)downward.
An older pump can be clogged with scale and rust. Sometimes you have to take the pump head apart, clean them out, etc.
In any case, check the first two, and I bet you will have much better pressure.
Come back if we can help you.
Good Luck!