noun
beginner; novice; beginning student
A person who has just started learning a subject or skill. Often used in educational or instructional contexts.
この本は初学者にもわかりやすい。
This book is easy to understand even for beginners.
彼はプログラミングの初学者だ。
He is a beginner in programming.
入門者 also means 'beginner' but often implies someone who has just entered a field or started a course, with a nuance of 'introductory level'.
Compound of 初 (sho, 'first, beginning'), 学 (gaku, 'study, learning'), and 者 (sha, 'person'). The word follows a standard Sino-Japanese pattern for 'person who does X'.