In these politically correct times I guess that would be a tradesperson.
apprentice
A young person who learns a skilled trade is often called an apprentice or trainee. Apprenticeships allow individuals to gain hands-on experience and knowledge in a specific trade under the guidance of a skilled mentor.
Usually it would be an 'Artisan' or 'skilled trade' .
a person who learns about the world by observing it.
banker
An Entomologist is a person who studies insects.
An apprentice learns a trade
Artisan
Apprentices.
An apprentice is someone who learns from a master in a specific trade or skill.
Gulliver learns the trade of a surgeon during his apprenticeship.
The average person learns about 27% of information everyday.