Teen looking for hygiene advice!

Edit: Thank you so much for the advice! I'm definitely going to try as many as I can! It warms my heart that people are willing to share there tips with strangers on the internet! Thank you so much <3

Helloooo! I need help to make my hygiene better! I have lots of things that I could improve on, and I really want to make sure I am healthy! (By the way, I am female!)

  1. Armpits - For some reason, when I sweat, the smell is ALWAYS changing, and it is VERY strong. They smell like a child vomited in chlorine....
  2. Lips - I don't know how, but under my lip and my bottom lip is dry as hell and I apply aloe vera vaseline but it doesn't do much??
  3. Hair - My hair is too thick, it is short and I can only put it in a ponytail. If I leave my hair out, I'm not even joking I look like I have an afro even though I don't have one (my hair type is wavy at the top (2c) to one massive curl at the bottom (3a/b) and it looks cute, somehow)
  4. Nails - I keep biting them and I want to grow them out. Does putting vaseline on them help? I heard it does.
  5. Discharge - I'm quite young, but I have discharge and it is staining my underwear! The last time I had discharge was like, months ago, and I don't know why it is coming back now. I have gone through puberty, I have breasts, but no period yet, so um yeah. How can I make it go, or stop, or just reduce it, etc.

Thats it! If you have any advice, please give! Also, if I need to buy a product (please don't suggest too much), make it cheap and I can possibly buy it at a local store/supermarket! Thankssss xx <3