That was quite an account. You are very well-written, and for you age, it speaks volumes. I appreciate that. Thank you!
I agree that you are relatively young to start using drugs or alcohol regularly (or at all, honestly). Your brain is still maturing. The earlier you start drugs, the more damage they tend to do, at least, IMO.
I will add that I think you seem to be someone who is doing pretty well with moderation since you took breaks in-between many of them and didn't continue to use. Drugs can become an expensive habit for both your wallet and life if you don't pay attention to what is going on.
So, in regards to feedback that is specifically about using them...I really would consider the safest drug on your list to be mushrooms. Some might say weed but it still does damage your lungs with repeated use. Mushrooms would be difficult to "overdose" and they aren't addictive in the traditional sense. They can become that way psychologically, though, if you like them a lot. They don't tend to have a really awful recovery besides maybe some tiredness the next day. They are really great at keeping you awake. I like them a lot. They also aren't going to get you in nearly as much trouble, legally, as other drugs such as cocaine or meth. They typically carry the same type of legal ramifications that weed would. I would check your local area for that.
Ecstasy can be a crap shoot. You could get crap or you could get really strong stuff. Be careful with this one. This one, when used excessively, can cause pretty bad depression. If you overuse that one, it can take quite a long time to recover. I have a close friend who took this 3x a week every week when she was a teenager, from about 15 to 17. She now has permanent depression from damaged receptors. We have talked about it many times.
Heroin and other opiates like Vicodin are extremely addictive because they can cause physical addiction. Its not true that you can become addicted after one use. Some people really like it a lot and don't want to stop right away. Physical addiction takes repeated uses for 3 to 5 days. Recovery is extremely hard. It makes you very sick. If you are curious about it, you can find several threads about how awful it is. This doesn't mean that every person that has used heroin becomes addicted. I have tried it twice. I found it to be boring. I smoked it. There is some interesting evidence about IV heroin being less damaging to your body than the use of pills, when it is good quality. Pills contain Tylenol which destroy your liver over time. Keep in mind, always, that pharmaceutical drugs are never, ever safer just because they are legal. They may be more regulated but abuse of them will reek havoc on your body.
I would be the most concerned with alcohol abuse based on your story. You are quite young and getting DUI's can make your life horrible. Hangovers make going to work and school horrible. And alcohol lowers inhibitions more than any other substance I have had the experience of doing. Ever single drug I have ever used and ever single experience I have done that was unwise, was done under the influence of alcohol. I am not an alcoholic but there is a fine line between getting drunk a lot and having a problem.
Cocaine is very expensive to do on a regular basis and a tolerance builds quickly. At your age, I would avoid it. It is hard on the heart and depending on how you do it, it really damages your soft tissues with repeated use. If you remember Whitney Houston's death, her heart issue was caused from prolonged use.
I would recommend the same for meth. It is stronger than cocaine. It is also more dangerous due to the chemicals that it is made with. When it is made properly, it is an extremely clean drug to use but that is not common, unfortunately.
I have used all these drugs many times. I like meth and cocaine quite a lot because I prefer stimulants. If you are going to use either of these, please educate yourself very, very well so that you don't fall into the same traps that so many others have. There is no reason to ever get "meth mouth" or cokehead nosebleeds. There is a ton of fantastic information here on Bluelight that can help you a lot!
One final note: You really are young. I am only speaking about your physical age. I absolutely respect the maturity you have to come on here and ask for information and try to use drugs safely. You are so much more likely to be able to use without making serious errors like many do. Hope my feedback is useful and feel free to message anytime.