Make full use of the drone that most Operators come equipped with to scout out your surrounding area. This game is all about being tactical and using the drone will help you plan your next move.
If you go to Uplay (you may need to install an app) and select the 'Rewards' option you will be able to spend 40 Uplay points to get 200 Renown. If you do this along with watching the 3 tutorials you will have 1,000 Renown which is enough to unlock two operators immediately at the start of the game.
Easy Tutorial Renown:
If you watch the 3 tutorials that can be accessd from the 'Main' menu you can earn an easy 800 Renown. You can get through the tutorials faster by skipping the cinematics. The 800 Renown you get from doing this is enough points to purchase a starting Operator of your choosing.