1. Train your AIm. There are many Games on Steam to improve your aim.(Kovaaks).
2. Lern the spray of the weapons. There are good workshop maps to praktice. You also can go and play against bots to learn it.
3. Don't play to agressive.
4.Play with your friends and talk with each other so you can make calls. If you play with randoms speak with him/her.
5.do always a warm up for your Aim am spray.
6. Play the maps you know.