[ opposite ]

If competence is a combination of knowledge, skills, and experience, then the direct opposite means being inexperienced, unskilled, and/or uninformed.  Though, there’s a scale for competence levels.

Looking at competence from the opposite side provides an alternative perspective, and perhaps some clues of what to do about it.

If knowledge is needed, there are books or courses or Google rabbit-holes to explore.  If skills are needed, repetitive action on a task will develop that.  And if experience is missing, then get out there and do things.  Experience is crucial to showing competence, and with no activity, there is no experience.