There is only way to properly lower a motorcycle, and that is through the shock absorbers.
Every time a new bike come out, some shadetree takes a bike, pulls a bolt out of the connecting links (dogbones) and lowers the bike down to "where it looks right" and drills a new hole, and then sells unwitting people a "lowering kit".
Altering the length of the connecting links completely alters the suspension function. It changes the rate at which the linkage controls the rear shock and can move the range of the wheel travel, dramatically altering the handling of the bike, and the geometry characteristics that are required for safe handling.
The only way to correctly lower a bike is to lower the shock absorbers internally. Since the stock shocks are not rebuildable, this must be done through aftermarket shocks.
The shocks are lowered internally by a spacer that prevents them from fully extending back to stock ride height (this is reversible, by the way, when you sell the bike at a later date). Using this method, the linkages and chassis geometry can remain balanced, and the bike will "bottom out" in the exact same location and at the exact same attitude as stock. This is critical for safety.
Past that, you will then need springs and damping in the shocks that can work properly in a much shorter range of travel. This requires higher rate springs and damping.
In other words, you can't safely change the entire design character of a motorcycle to compensate for shorter stature and have it ride safely and comfortably for $200 (or less).
I always recommend shorter riders start with boots with custom thicker soles. There are many on the market, or you can have some custom made. Adding an inch to the bottom of both boots goes a long way!
Then if that's not enough, I recommend a custom saddle, to help compensate.
THEN, if that's not enough, we can build shocks that will meet your height requirements.
The goal is to still be certain you are driving a safe bike that feels like $30,000, not $3000.