new player!! im confused

hello. i recently started playing next week only because my younger cousins influenced me to. I enjoy the game overall and I want to continue playing but some of the mechanics (?) is confusing.

1. I also recently bought a new character, The Mind’s Eye and I saw that some people claim that she’s the worst one? Can someone elaborate? I actually like her 😭

2. Talents (?) or skills, does using your skills reveal your location to the hunter?

3. The chart where you can improve your speed, etc. what’s the best one to use? Is it always capped at 120 points?

4. Ranked games. Why do I still gain points/stars even if we lose? Is it because i’m still at tier 1-3?

Help

Also looking for some people to play with to carry me 😔 preferable that you guys are 18+ y/o cuz I’m 20 F (just recently).