Some advices :
- think twice before posting things on the Internet
- don't do stupid shit
- start asking your parents about things in life you should know, like taxes, jobs, emails, etc
- start or solidify your routine, especially onn cleaning yourself and your house.
Take things slowly, if you can, you got the time to learn. Oh also spoiler alert you'll stay the same after your 18th birthday. No sudden mentality change like at 13, nun.