i got reported about 4-5 months ago and got banned for 2 weeks.
all it will take to get you permabanned is one slip up. don't intentionally feed, don't afk, don't talk shit in chat. honestly don't say anything in chat unless it's important information to your team, or maybe a "gj" every once in a while to help morale
do NOT worry about being reported if you haven't done anything wrong. i was reported probably 20+ times in the 3 months after my ban (it takes 3 months to drop a punishment tier, read nami's comments) and i was never once punished because i improved my behavior. even if you get a warning message saying "your recent behavior is not in like with etc etc" don't worry about it, don't stress over it unless you've done something wrong.
you should be scared to lose it. one more game of raging at your teammates and everything gets deleted for good, you lose all your skins, rp, rank, friends list, everything
BUT since you got a 2 week warning ban instead of a permaban, it can't be that bad.. reform is easy as long as you remember what's at stake. i was terrified of losing my account. that's what motivated me to become a better player.
good luck. don't type anything unless it's important.