Well the “ha” (は) pronounced “wa” is basically like a pointer to the word before it. Like smb. comments “THIS” after it.

The “wa” (わ) character on the other hand is used as a letter in a word. It won’t usually stand alone in a sentence (which is a bit weird since the japanese usually don’t use spaces so you just have to guess/know)

The は is also used in words so have fun knowing when it is a particle and when not.

I am just a beginner on japanese.