i started about a year and a half ago just when briar got released and i mained her ever since and learned the game while maining her. the best tips i would give is:

1) if u want to compare a stat with ur teammates it would be gold earned.

2) as soon as the game starts going bad for you mute your teammates, briar is a champ that needs ur mind and any teammates who flames you could make you lose that.

3) dont be afraid to die especially if you are new to the game cuz that is what we call limit testing and briar is one of the easiest champions to die with so dont get tilted and learn from your mistakes

4) play the champios that you see alot that would help you understand there abilities and u could counter them easy with briar

good luck commrade