How do i get rank

Yes, practive makes perfect.. I would watch videos about the macro game...

Play some aim training maps like Aim Botz (try to beat my time 56s 100 kills default amount of bots), sometimes play on deathmatch community servers. Learn how to throws some smokes and after several hours I will better.

After playing your first ten games you will be put in a rank with opponents and teammates of the same skill group as you. you can rank up by winning more games. Kills dont matter but getting more MVP's helps.

After a bad game at 12kills i reach silver III. and i derank in a good game but lost x)

just get better man and practice or just go play fortnite like all the kids

Just get better at the game, pracice on maps and other stuff

Just keep playing the game.
That works in the most games lol.

how to get better stats in the game for the better rankings in the game?

Just keep winning! You'll get there or if you are bad at the game you will get demoted on rank!

yea try and improve your stats and be better about economy throughout the game, it factors those in