der Neuling
newcomer
A person who is new and inexperienced in a particular field, group, or activity.
Als Neuling im Team musste er sich erst einmal einarbeiten.
As a newcomer to the team, he first had to get settled in.

newcomer
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newcomer
A person who is new and inexperienced in a particular field, group, or activity.
Als Neuling im Team musste er sich erst einmal einarbeiten.
As a newcomer to the team, he first had to get settled in.

The word is derived from the adjective 'neu' (new) and has the ending '-ling'. This ending is often used for people who have a particular characteristic. A 'Neuling' is therefore literally a 'new person'.
Der Trainer gab dem Neuling eine Chance, sich zu beweisen.
The coach gave the newcomer a chance to prove himself.
'Neuling' is often used with the preposition 'als' (as) to describe the role. Another typical construction is 'ein Neuling auf einem Gebiet sein' (to be a newcomer in a field), used to name the area of inexperience.
Als Neuling in der Firma hatte ich viele Fragen.
As a newcomer to the company, I had many questions.
The word is very versatile and can be used in almost any context where someone is new: at work, in a sports club, in a hobby, or in a social group.
Die erfahrenen Wanderer halfen dem Neuling beim Aufstieg.
The experienced hikers helped the newcomer during the climb.
expert
'der Experte' and 'der Neuling' form a contrast. An expert has a lot of knowledge and can confidently help in a particular field. A newcomer is new to a group, a job, or a topic and does not know their way around well yet. 'Neuling' especially emphasizes that someone has not been part of something for long. 'Experte', by contrast, emphasizes specialist knowledge and ability. So you can say: the newcomer often still needs help; the expert can provide it.

Im Team ist Max noch ein Neuling und fragt viel nach.
Max is still a newcomer on the team and asks a lot of questions.
Bei diesem Problem kennt sich nur ein echter Experte aus.
Only a real expert knows how to handle this problem.