The best opening move for 5-5 in backgammon is 13/3(2). The 3-point, the only good point a 5 makes. Watch it on the board, then read the idea behind it.
The idea behind the move
With 5-5 play 13/3(2): two checkers from the 13-point travel through the 8-point to the 3-point and make it. It is the only good point you can make with fives.
What comes next
Three checkers remain on the 13-point, and the 8- and 6-points are solid. Your back checkers stay on the 24-point, waiting to get free.
How to read the move
A move like 24/18 means one checker goes from your 24-point to your 18-point. Points are counted from your side: 24 is the farthest, 1 is the deepest in your home board. “(2)” after a move means you play it with two checkers.