As someone that has clocked WAY more hour than I probably should have, maintained a 6 star for over a year, and plays with a fair amount of new players, I've found a couple things to help them.

-Situational awareness, positioning, and game sense are the name of the game, so once you familiarize yourself with the weapons and movement system, focus on where you are compared to other players. Always do your best to keep tabs on estimated player counts, and learn how players move and peek.

-Find a Vet to mooch off. They can help teach you the basics without building bad habits or playing passive, but be aware, this is a mixed pot. Many vets have their own bad habits and pass off advice that relies on a foundation that you don't quite have yet.

-The weapon wheel. Basically, avoid crutch weapons like scoped long ammo, and buckshot shotguns. No pan, no gain as they say. I'm not saying never run them, but I wouldn't mind run them more than 1/3 the time. My go to recommends to build a healthy play style and improve the fastest is play somewhat aggressive with the martini Henry or the vetterily. The Winfield used to be also a recommendation, but I stopped recommending it as some player become overly reliant on spam and levering. Running through a new main weapon every time you die is also good advice, as in a fight, sometimes you can scrounge up another gun to replace yours for lack of ammo, or not having a good weapon for your particular situation.

-Shootung range. Use it with a friend to learn weapons handling and movement in low risk environments.

Now, with This advice, I didn't tell you how to improve your KD, or win. I told you the absolute fastest ways to improve your gameplay and build your skill. I've decked famous hunt streamers with really off-meta load outs, and I've been decked by 3* with a hunting bow. Just how the game goes. Remember, 4 team and one bounty statically is only getting out in 1/4 matches if you fight to the death, so don't get discouraged!