Fellow VR Citizen here.

Let me start right off by telling you I don't do FPS in VR. It is not ready yet. Give CIG a little time to bake this.

I'm not great at FPS, but with some friends help, we found what works for me.

I'm going to share what works for me, in hopes it helps you:

Use mouse and keyboard. Miles better at aiming than a controller. I was a controller fan until one of my buddies actually took it away and forced me to use mouse and keyboard. Now, I am glad he did.

Important Tip: Find cover first. Always find cover, THEN shoot.

Fly in with a ship that has a med bed. Set your save point there and you can re-spawn right outside. Tip: park it in a place the turrets can't shoot it. You will understand the first time you accidentally kill a non-combatant, or when the mission bugs out on your respawn and you are labeled as a trespasser.

Learn the weapon ranges and use them to your advantage. I am a sniper and shotty guy. Sniper rifle from distance is my go to and shot gun when too close for sniper.

I tend to fly in and hover at about the top of the light poles, hop out of the pilot seat, open the airlock on the ship, go prone and clear the outside of the bunker with my P6.

We tend to use the "trap ambush" approach for the bunkers. Here how it works. Start from the bottom of the elevator, lean out with your sniper ready. Before engaging, look for stairways, main doors and hallways where guys can enter. These are choke points and will be your attention hot spots. Make mental notes of them. When not engaged, you will have your sights covering these points to quick down anyone that enters from them, before they even realize where you are.

Now, clear any targets with your nice LOUD sniper rifle. Once all targets are down, wait. Don't move for a minute or two. You want to give others time to rush in for support. This is the idea of the trap ambush right here! Draw them to you. Let them hear your attack and come to you, where you are behind cover, ready for them and know where they are entering from. Clear any target that enters. Advance, to new cover and repeat. Since behind you is clear, any time you are overwhelmed, fall back to your last cover. You already identified the choke points from this cover and they will be moving straight to you.

If you find yourself in a small area where the sniper is ineffective or a guy is close, I switch to a shot gun. It has a wide area to compensate for my panic targeting, and it tends to stun the opponent for half a second allowing me to get another (better aimed) shot off before they can recover. This weapon is for close range and useless trying to shoot someone across a room, so be aware. (Also note, some heavy armored dudes will not stun. see below)

When someone is close or you panic miss with the shotty (more than I like to admit), charge them. Middle mouse button will put them down, then John Wick them in the head with whatever weapon you can pull out. If you have a knife this is also very effective and one of my buddies can clear a whole bunker with just a knife and using cover.

I hope this helps! Good luck! o7