学
This Chinese character means study.
You can watch how to write this. - (「学」の書き順（筆順）動画 - 漢字書き順辞典)
There are 2 ways to read this, "まなぶ (学ぶ)" or "がく".
When this is combined with other Chinese characters, this is often read as "がく".
For example, "学問 (がくもん)" also means study.
"問 (もん)" means ask.
What are you interested in?
For example, if you are interested in language, you can know it is "言語 (げんご)" in Japanese by dictionary.
And then, combine it with this Chinese character "学", you can get another word, "言語学 (げんごがく)" in this case.
"言語学" means linguistics.
"学" is useful word because you can make new name for new academic fields in this manner.
By Higashi-Mikawa Kyōjindō Shujin (東三河狂人堂主人)