A straightforward loanword for a person new to an activity or field. Common in casual contexts, often used in hobbies, sports, or skills.
He's still a beginner, so please teach him from the basics.
This course is designed for beginners.
This shop has a lot of ski gear designed for beginners.
I signed up for the beginner tennis course.
I had beginner's luck the first time I went to a casino.