Thing with weed is its always going to look good if you compare it to other vices like cigs, booze, or hard drugs.
But it is not some miracle working thing unless you are treating a specific serious illness and it happens to be a good fit medicinally for you and your ailments.
There is nothing positive that weed can do for a healthy 14 year old, sorry.
Regular, habitual, marijuana use is a good thing if you are doing it in place of some other vice (getting hammered, drugs etc) and can socially have benefits like making you enjoy a fucking awful job or be nicer to others.
Basically, weed is good if you are a fuckup with no intention of bettering yourself. If you want to go from point A to point B it won't really help. I have smoked plenty of trees in my time but I can't really work it into my life right now snce I don't think the impact will be positive. I need to make decisions on what games I am going to bet on or not bet on that have consequences of potentially thousands of dollars.
In the summer when I am home and waiting for it to be fall so I can earn again I'll be burning all day long.