help, i'm so scared my samsung will experience burn-ins, i'm so scared, i read really horrible things about them.

like warranties wont cover burn-ins either
i got a 42in samsung hps4253 and people said they've experience burn-ins after 2-3 months and ghostings also and that they wont ever buy a sammy again, oh god i'm so scared for my tv man, i'm so broke and my dad bought me this tv

help how do i fix burn-ins and ghostings? if it ever happened to me, how do i prevent it?