Just got this game...to save myself 399 pages of reading - anything a new player really needs to know before I get stuck in?
Yes you will die a lot (I still do and I just leveled up to 21!).
General Tips:
1. Start as medic and level up as quickly as possible (heal/revive team mates when you have the kit and defib).
2. Get the m60!

3. Use cover and don't run in straight lines, otherwise someone else with an m60 will snipe you from t'other side of the map.
4. Fire in short controlled bursts, anything longer and you'll hit the trees, ground, sky, the little bird nesting 300 meters away but you'll not hit your intended target and he'll shoot back and kill you in one hit.
5. Get the m60.
6. Get the Carl Gustav rocket launcher or better known as "The Noobulator".
7. Kill/Death ratio is not where it's all at. Go defend/attack those mcoms stations, help team mates, repair vehicles etc.
8. Get the m60.
9. Try out all the vehicles.
10. Pick up fallen enemies kits for better weps/gadgets.
Config
1. Lower some graphic details to up the FPS as much as possible.
2. Make the config changes to gamesettings.ini and settings.ini to alter the mouse smoothing speed on land, sea and air (made a big difference to my game)