: Sometimes, the best and most reliable source is the official website of the publisher or the series. Look for "Shin Kanzen Master" and see if there's an official site or a page dedicated to N4 kanji.
: Try reading graded readers (Tadoku) or simple Japanese websites to see N4 characters used in natural environments. shin kanzen master n4 kanji pdf --EXCLUSIVE--
In the PDF, you will find exercises where the kanji is shown, followed by hiragana readings and example sentences. The most effective way to use this is the "Curtain Method": : Sometimes, the best and most reliable source