This is the theme tune to the Disney version of the famous legend from 12/13th century Nottingham.
Here is the chord sequence. It's pretty basic, it just goes;
|G///|G/D/|G/C/|D/G/|
The time signature is mostly 4/4
The last bar is 6/4
This is the tab
e|-0---0---------------------0---0-----------------|B|---4------1-1----------------4-----1-0-1-3-------|G|----------------2-2-0----------------------------|D|-------------------------------------------------|A|-------------------------------------------------|E|-------------------------------------------------|
e|-0---0----------3-1---------------0--------------|B|---4------1-1-1-----1-------0-1-3---1------------|G|------------------------2-0----------------------|D|-------------------------------------------------|A|-------------------------------------------------|E|-------------------------------------------------|
If you're stuck, have a listen to the song.
In the meantime, enjoy!