As far as practicing for the final circle, I found I have started doing better after I started parachuting into spicy drop zones like Pochinki and the Army Base and such and playing more aggressively. Even though I often get killed quickly this has taught me to listen, spot and shoot better at the close ranges that are also present in the final circle. It has also made my overall skill at the game better.
Also, my gripe of the day:
They need to make some kind of adjustment to the reload for the S686. There is maybe a half second delay from when the barrel snaps shut and when the game registers the gun as actually loaded. Fairly often I find myself pulling the trigger and the gun is empty even though I just reloaded because I opened a door or picked up some loot in that half second because I thought it was through the animation. In real life this kind of shotgun is ready to go the second you shut the action, it cocks automatically when it closes. Even if you didn’t know that, the audio and visual cues of the animation I believe would make you think its ready when its not. (Those not familiar with guns please confirm/refute?) I think the reload time is fine from a gameplay and balance perspective but maybe they should make the animation slower so that when the gun shuts it is in fact loaded and ready.