There is no such thing as hosts offering internships to those wanting to get into the STR business on Airbnb. That's because what you want in effect is for the host to train you in the STR business for free. @Gift26
Two options 1) do STR in a room in your home to gain experience and 2) contact property management companies in your area and ask if they have any job vacancies.
By the way didn't you make a similar post a few weeks back with a slightly different user name?????