My first map in Shootmania is a symmetrical map with a lake running through the centre. There is only one bridge across, so make haste!
The map has three capture points each in favour of the defender on each side (except for the last point). There's several strategies for attacking or defending and lots of cover to move around or flank. There is a sniper deck each, and choosing to be a sniper will give you full view of the map, but will also put you in plain sight of the enemy sniper, so be careful.
There's a quick guide in the intro to point out the important places in the map and get you going quickly.
Have fun!