Should I move to a shortboard?

I've been surfing for the past four months two times a week, and I'm consistently trimming and carving down
the line on shoulder high waves with my soft top 6'6 surfboard.
My brother got for his 13th birthday a 6'1 short-board and the condition of the surfboard is very good.
the surfboard measurements are:
Length:6'1
Width: 18 inch
Thickness:1.1 inch
here are some picture of the short-board:
https://www.dropbox.com/s/w1r3ypp0vx0so ... d.jpg?dl=0
https://www.dropbox.com/s/rmx4yz8vltpnr ... 2.jpg?dl=0
I will replace the leash and the traction pad too.
I'm 13 years old, 155 cm and 5 foot and 100 pounds.
I appreciate all the replies!
the line on shoulder high waves with my soft top 6'6 surfboard.
My brother got for his 13th birthday a 6'1 short-board and the condition of the surfboard is very good.
the surfboard measurements are:
Length:6'1
Width: 18 inch
Thickness:1.1 inch
here are some picture of the short-board:
https://www.dropbox.com/s/w1r3ypp0vx0so ... d.jpg?dl=0
https://www.dropbox.com/s/rmx4yz8vltpnr ... 2.jpg?dl=0
I will replace the leash and the traction pad too.
I'm 13 years old, 155 cm and 5 foot and 100 pounds.
I appreciate all the replies!