How Long in Braces?
Your dental crowding is minor. Find a doctor who uses Fastbraces and you could finish your case in as little as 20 weeks.
Typically we treat both top and bottom teeth at the same time. You appear to need minimal movements, and that may be done rapidly; however based on the images its difficult to judge exact time. Clear aligners, like the invisalign would work great for you.
All the best,