It will be important to learn some of music theory to make yourself a more useful guitarist.
Terms for playing the guitar are located somewhere else. Terms for playing guitar are as follows...the definitions used are not the technical definitions, they are mine:
Note: 1 sound when plucking 1 string
Sharp (#): 1 note higher
Flat (b): 1 note lower
Octave: the same note 12 notes away up or down
Chord: a group of 2 or more notes played together
Major: a chord with a "bright" or "happy" sound
Minor: a chord with a "dark" or "sad" sound
Key: A group of chords played together
Root: Sounds like "home", it is the note that tells what notes are used for a chord or a Key
Transpose: To move the sound of the notes
Just like learning to write there is an alphabet for music. People normal call them by their names but they are notes. The paino nicely organizes these notes...the guitar also but takes some getting used too. So we are going to focus on chords and rhythmn instead of leads.
So knowing the music alphabet makes it so you can transpose a song into a key that you can play or use the capo effectively.