^^^ agreed, much good advice in this thread.
also, if you really dont want to learn the hows and whys of theory you can just remember a couple of things that allow you to use little bits of it without worrying about the bigger picture.
for example, for (a note) major you will get far playing that note, the one one string up and one fret back, and the one one string up two frets foreward
for example D major
----------------
-------4---7------
----5------------
----------------
or the minor version of D
--------------------
---------------7----
--------5---8-------
--------------------
now, the next time a guitarist says im playing G minor or whatever, you just find G on the neck and play the minor pattern and you will have the three most important notes for that chord.
if it doesnt bother you, you dont need to know why this is, just learn the basic notes for each chord. add others random notes too, just use your ear to tell you whether they sound good or not.
also, if you really dont want to learn the hows and whys of theory you can just remember a couple of things that allow you to use little bits of it without worrying about the bigger picture.
for example, for (a note) major you will get far playing that note, the one one string up and one fret back, and the one one string up two frets foreward
for example D major
----------------
-------4---7------
----5------------
----------------
or the minor version of D
--------------------
---------------7----
--------5---8-------
--------------------
now, the next time a guitarist says im playing G minor or whatever, you just find G on the neck and play the minor pattern and you will have the three most important notes for that chord.
if it doesnt bother you, you dont need to know why this is, just learn the basic notes for each chord. add others random notes too, just use your ear to tell you whether they sound good or not.