There is a difference between semi-skilled labor and unskilled labor. Semi-skilled labor requires some training. Unskilled labor does not require the same type of training.
Someone with trade-specific training and experience.
Architect
One without an education or skills training.
yes you have to be experienced and skilled as they are VERY unpredictable
Skilled Labor
unskilled, semiskilled, skilled and professional. unskilled=those who work primarily with their hands because they lack the training and skills required for other tasks. semiskilled-workers with enough mechanical abilities and skills to operate machines that require a minimum amount of training. skilled-includes workers who are able to operate complex equipment and can perform their tasks with little supervision. professional-those individuals with the highest level of knowledge based education and managerial skills.
Online learning
By taking practical training from NSDA
He was a skilled and trained fighter pilot. Landing aircraft was part of his training.
Although he had explored caves in his teens, he did not consider himself a skilled spelunker.
Mastering a specific job with a few weeks of limited training is called semi-skilled labor.