It is really cool, to start with marijuana in your teens. Ignore parents, wise friends that say don't do it.
You, as a younger person,, know far too much already. You know for instance, that alcohol is worse, know that nobody ever gets addicted to pot.
Later you can experiment with other drugs, like speed, X, lsd, opioids, heroin.
In part such experimentation grows from invincibility, from haveing used pot without bad effect. This proves the ones that advised against it, were wrong.
Street drugs areoften laced with other ingredients, to make them stronger, to keep the customer coming back.
Fentanyl is extremely strong, so when used to increase strength, it is unpredictable.
But once started on your smart journey with drugs, it will be "okay" this time.
Best strategy is to just steer clear of mind-altering addictive substances.