Other RTS games have a small “count down timer” before the game starts where players can have a quick look at their starting position and decide on a strategy.
An example of this is in supreme commander where the player gets to have a quick look at the map while their ACU is gating in.
A simple 3, 2, 1, go! would work really well.
At the moment it feels like a group of athletes waiting at the start line then the gun goes off without warning.