In my opinion, first it's better a dentist examine you clinically and if required take an X-ray to find out the exact reason for the gap between the two teeth. If there is generalized gap between your teeth, braces will give you permanent solution. If you are going for clear aligners (a type of Ortho treatment), you need not worry about the visibility of braces. If the gap is only between the front two teeth, direct composite filling or veneers will solve the problem. Hope this may help you out.

There are mainly two options for u ... If u feel like getting teeth straighter nd closed gap , then u can go for braces treatment which is ideal but will take time of at least a year or so Nd second option is you can go for filling midline diastema with direct composite filling (laser filling) ... U can also get crowns on ur teeth for quick results ...