When you download an N5 grammar PDF in Bengali, it should cover the following core pillars. If a resource misses these, it is incomplete.

Japanese is a language with a structure vastly different from Bengali. While Bengali follows a Subject-Object-Verb (SOV) pattern (like Japanese), the particles, conjugations, and politeness levels operate on entirely different logic.

Speak aloud. Read the Bangla translations of example sentences and say the Japanese out loud before checking.