Dude you're just a 900.
If you're not atleast higher than a 1500 you can't be a coach, you're still at the beginner level. If you were to coach at a low rating, you would possibly not have a great time teaching your chess wisdom to lower rated players because you are still a beginner. But that doesn't mean you can never be a coach, play serious chess and admire the difficulties and challenges you experience along your journey.
If you are a really desperate person, go teach a suicidal 500 elo rated player how to not make a blunder.
Yeah, I wanna get into coaching chess for elo below 500 but I don't know how to start could anyone help pls!