入
This Chinese character means enter.
You can watch how to write this. - (「入」の書き順（筆順）動画 - 漢字書き順辞典)
There are 3 main ways to read this, "はいる (入る)" or "いれる (入れる)" or "にゅう".
"入学 (にゅうがく)" means entry to school.
"入国 (にゅうこく)" means entry to country.
"入門 (にゅうもん)" means entry to gate.
"入門" often means begin to study or learn something.
"入口 (いりぐち)" means entrance.
The shape of "入" is similar to that of "人".
"人" means person.
Please be careful.
By Higashi-Mikawa Kyōjindō Shujin (東三河狂人堂主人)