Your early tooth closure is also caused by jaw structure and tooth shape development.
At present, the appearance of teeth cracks is definitely related to bad habits such as sticking out your tongue, sucking your fingers and breathing through your mouth. If bad habits can be changed, we can still arrange dentition by the constant convergence of lips and tongue.
But I don't know the extent of what you said, but I can't judge accurately. It is suggested that you can upload photos of your teeth first, so that you can distinguish them relatively accurately.
Of course, few people have the perseverance to stick to a correct habit, so there is orthodontic treatment. Orthodontics can be performed at any age, but the older you are, the longer it takes.