Intro: Just mess around finger picking these 3 chords, makng sure to pluck the 
high 'e' on the 2nd beat of Am Em, then delayed on the Fmaj7:



E|-----0----------0----------0------------------------------------------------|
B|-----1----------0----------1------------------------------------------------|
G|-----2----------0----------2------------------------------------------------|
D|-----2----------2----------3------------------------------------------------|
A|-----0----------2----------3------------------------------------------------|
E|-----x----------0----------1------------------------------------------------|

       Am        Em        Fmaj7





For the rhythm part use these chords and work out the pattern, it's not hard:
*the B7 is used as a link chord between the A & F*

E|-----0---------(0)--------0-------(0)--------------------------------------------|
B|-----1---------(0)--------1-------(0)--------------------------------------------|
G|-----2----------2---------3--------2---------------------------------------------|
D|-----2----------1---------2--------1---------------------------------------------|
A|-----0----------2---------3--------2---------------------------------------------|
E|-----x----------x---------1--------x---------------------------------------------|

        Am        B7      Fmaj7      B7




In the little bridge-y section, these chords are alternated:

E|------5------------0---------------------------------------------------------|
B|------6------------1---------------------------------------------------------|
G|------7------------2---------------------------------------------------------|
D|------7------------2---------------------------------------------------------|
A|------x------------0---------------------------------------------------------|
E|------x------------x---------------------------------------------------------|