I hope this is the right place to post this.

I can't seem to deviate away from a basically the same melody all the time.
And when i can, its especially hard to make a transititon to the chorus.
Any help on how to get out of the rut?

P.S. Help for going chords first, then changing it into power chords, or?
Change around the chord prog for the chorus. Say you were doing a I-IV-V for the verses, maybe do a ii-V-IV for the chorus. Just stay in key and mess around with alterations. Dunno the sound you were looking for, just throwing **** out there.
had the same problem at first.. chorus and verse sounded liek different songs or just the same riff repeated slightly differently xD

Best advice = Practise.