Hi @eduKit
I just saw your post!
Jasonelle, like other wrappers, has its own set of execution commands in a json file. But 90% of Native you need are already inside Bubble and plugins. You have no code to learn if you take the file as just to wrap.
If you need special native function, you can follow my post : create a free native app
It depends on how responsive your site is. If your site is 100% responsive for a 320x phone pixel, then it’s easier.
Jasonelle do nothing, just display your html site.
Free, faster than other wrapper when is time to update your app. No more compilation too.
from 1 hour to 6 months? no clue. 
Nobody until now are sharing their apps, secret weapon I presumed 
Enjoy!