Most of the achievements are pretty easy to pick up in just one playthrough if you know what to do . You could do everything in one playthrough on veteran but since veteran is very difficult it's best to start on normal or easy and grab all the miscellaneous achievements while preparing yourself for veteran.
Easiest to do on the “War Pig” mission on the Recruit difficulty. Make your way to the container to the right of the bus. Grab the RPG’s on the other side of it, then simply aim at a helicopter and shoot it. For good measure, take out both helicopters.
Mounting: After knocking down all three targets with your pistol, you’ll then be instructed to switch to your assault rifle. Swap to this weapon, and you’ll be asked to mount it on a piece of cover. Mounting, as the tutorial explains, is great for reducing recoil and engaging targets at medium to long range. 5.
Tac Map and Circle Collapse: It’s important to bring up your Tac Map before you drop, so you can quickly ascertain where you’re wanting to land, the nearby areas of interest, the named areas and where they are in relation to you, and where the Circle Collapse is likely to start.
Whether it's getting a better understanding of the basic mechanics or practicing against artificial opponents, never feel bad about doing the Tutorial. In fact, come back if you're ever unsure of the basics or need a warm-up before dropping into a proper match.
Once you get to level 25 , you'll unlock the G3. Practice with that and the sniper rifles, and you'll most likely be able to dominate with any other weapon. Use the red dot sight with pretty much every weapon. Use both types of grenades that you have (special and frags).
Also an m16 works well with deep impact. Watch for those red dots on your map, and if they are in front of you, along with a wall, spam that area.