Alone Tab

Hey guys this is my version of Alan Walker's song Alone. Any suggestions on how this tab could be better
it would be very much appreciated. This is my first tab and it's made by ear so please don't be harsh with me.
It is basically the vocals transcribed into guitar.
 
 
1st Part
 
E|--------------------------------------------------------
B|--------------------------------------------------------
G|--12-10-8-3/7---7-7-5-5---7-10-12-10-8-3/7---7-7-7-5-5--
D|--------------------------------------------------------
A|--------------------------------------------------------
E|--------------------------------------------------------
 
2nd Part
 
E|---------------------------------------------------------------------------------------
B|---------------------------------------------------------------------------------------
G|--12-14-15-15-15-14-14-12--------------------------------------------------------------
D|----------------------------12-15-15-15-13-13-12---12-8-8-8-12-15---12-7-7-7-12-15-----
A|---------------------------------------------------------------------------------------
E|---------------------------------------------------------------------------------------
 
3rd Part
 
E|--------------------------------------------------------------
B|--------------------------------------------------------------
G|--15-15-15-14-14-12-------------------------------------------
D|----------------------12-15-15-15-13-13-12---12-8-8-8-12-15---
A|--------------------------------------------------------------
E|--------------------------------------------------------------
 
4th Part
 
E|----------------------------------------------------------------------
B|----------------------------------------------------------------------
G|--15-12-15-17-15-17/15---15-12-15-17-15-17/15---15-12-15-17-15-17/15--
D|----------------------------------------------------------------------
A|----------------------------------------------------------------------
E|----------------------------------------------------------------------
 
Then it's all again from the beginning.
 
And then it's the last part.
 
Last Part (I am not alone)
 
E|------------------------------------------------------------------
B|------------------------------------------------------------------
G|--12-14-15------15-15-14-15---15-19-17-17---15-12-15-17-15-17/15-- x2
D|-----------13-----------------------------------------------------
A|------------------------------------------------------------------
E|------------------------------------------------------------------
X