Staying safe on Instagram! Follow these simple steps
Make your account private. you can do this by going to "options" and turning on "private account". This means that someone will have to request to follow you. You should decline them if you have never met them personally.
When posting picture it gives you the option to add your location. Never add your location to any picture as this can be very dangerous.
Speak to your parents about the app you are using. They can then ensure that you are safe and if you have a problem that is happening through that app, they can help you and understand the best solutions that are specific to that app.
If you have witnessed anything of any harmful nature on Instagram, immediately report the person or post. If they continue to harm you, go to their profile and block them. This will ensure that no further harm can be inflicted on you from them.