Sorry this is a long one.
Our 16 year old is very immature. He is in his final year of school and still keeps getting into silly trouble at school. (Nothing major just not doing homework EVER / constantly messing in class) he says he doesn't like school (apart from the social aspect) and wants to leave and do a trade but doesn't have any idea what trade (he worked on the building sites with his dad during the summer and doesn't seem to like working either) he is quiet lazy in general and has to be asked multiple times to carry out simple tasks.
The school suggested I get him accessed last year for ADHD, However our GP reported back to me after about a month that cams do not see any need to have him accessed and that was the end of that. It costs €900 for private assessment and over a years waiting list. However we were told if we go this route, it is more or less a diagnosis only and can't prescribe medication.
We have tried different alternative methods ourself like diet, supplements, exercise, kinesiology but he thinks this is all nonsense. He believes himself he has ADHD (we strongly suspect it too) but he won't even try to help himself - under no circumstances will he even take supplements in the morning. It's like he literally decides before we even suggest anything he is going to do the opposite.
His friend group wouldn't be great either, we caught him vaping and smoking weed last year and ever time he is in trouble, the exact same people are involved (as far as we know he hasn't been vaping/smoking weed since) his friends are in constant trouble (minor thing but just all the time and they parents never bat an eyelid) he insists we are too strict if we ground him for getting yet another detention. (I really don't think we are too strict, he has a dirt bike, is allowed to go to parties, have a few drinks etc - we just insist he behaves himself and no vaping/drugs)
We are seriously trying to pick our battles with him but he just won't listen to a word we say. He has sports most evenings but often skips them. He also doesn't seems a bit depressed but won't talk to us as he says it turns into s lecture every time.
His school are be quiet good and giving him exceptions from languages, special consideration during exams, movement breaks etc.
Where do we go from here? Any time we punish/ground him, he gets really down - to the point where we are worried about him hurting himself. If we ignore some of the behaviour, it just seems to get worst. If we try talk to him, he says we are lecturing him. He is not happy but also no interest in doing anything fun (apart from walking around town but his friends who are always in trouble)