The next world is perfect and permanent. This world is neither, so save yourself the stress of trying to make things perfect (house, job, body, relationships, bank account, etc.) Embrace the impermanence by cherishing the good times. Know that the bad times won’t last. Remember that you are loved very much, and that God will shower you with the grace you need to handle whatever this imperfect life throws at you.
You can get into big trouble (with school and the law) even by fake / joke threats of violence (bomb threat, etc.)
No jokes or pranks that have anything to do with violence.
For a bad cut / gash, use a rolled up washcloth or hand towel to apply pressure until you can get to an ER.
If you have to drive yourself or need your hands free, secure the towel in place with duct tape.
Change always brings feelings of unease. It’s easy to confuse that feeling of unease with the feeling that something must be wrong. Give yourself time to adjust before deciding if a new thing is bad..
Start “home economics” school with them. Laundry, cleaning, cooking, how to change a diaper, comfort a baby, soothe a toddler, what's involved in caring for pets, budgeting for food, keeping track of maintenance schedules for humans, pets, cars and machines. Engage with guests, be a good host, etc. Know when and how to tell someone to GTFO of the house (racist or misogynistic speech, etc.) Every kid needs to learn the art and science of home management. Look for and point out examples in books and movies of good home science skills.
Find one or two scary documentaries on the dangers of gambling. Watch together. Betting on sports is a big thing in some schools and I want to scare the $@!#% out of him about how bad gambling can screw up his life. Check online tools from gamblers anonymous.
You may end up being a big shot, Good for you! But check yourself. The good lord wasn't above washing his friends' dirty feet so please don't feel like you're above any task that needs to be done. Enjoy your success but stay humble.