Learn Guitar Certified

I have never played guitar in my life. I have a music background and I already tuned the guitar.

I need help. I have the chords to play I just need someone to explain them to me because I can't read them

Here are the chords for the song.
http://www.ultimate-guitar.com/tabs/t/the_maine/who_ever_she_may_be_crd.htm

go to 8note.com