Hey there, I'm new to the game. Any advice?

I have only began the division 1 a couple of days ago, rn I'm level 15 and I have done the three first wings missions (medical, tech and security) and some more of them later on. I have a specialized m60 LMG and a specialized SRS marksman rifle and a standard saw-off shotgun. I use the scan skill with extended range and the turret with mods (yet) and my two talents till now are the 7 seconds immunity after healing and increased damage when I move from a cover to another. So does anyone have any form of advice for me?