Make sure you have a good headset and mixamp if you're willing to spend money on your gaming set up
Whether you go with closed back or open back is your preference.
Awareness is huge in battle Royale.
Also, make sure you're always checking the edge of the circle. Players love to gate keep players who are hugging the circle just trying to get in.
And always take advantage of head glitches whenever possible. Unless you have Scump aim, try to avoid shooting at people in open space. You're gonna be too easy of a target.
The best players make all this stuff look easy and they tend to play fast but if you know what you're looking at, you can learn a lot from watching them.
If your aim needs work, I find that 90% of fixing that is just working on centering.