Hi :)
To shout to someone you need to click the megaphone icon next to their name, to shout back to someone you click the shout trail tag next to the shout.
I hope you soon realise that there are nasty people in the world but for them to hurt you they need to know you, and people can’t know you as well as yourself, if you are happy, and know yourself then you will see that what anyone says to hurt you is just a lie.