Choir - in over my head???

I've been ringing for several years now, but almost always the less demanding register of the very high bells, or on the bells right around middle C that are easy to pick out in the music.

This year, Steve B (our director) assigned me to bells still at the top of the treble clef, but much more always active.  I have E6 and F6 with the associated sharps/flats.   They are slightly harder to pick out of the score and I'm struggling a bit.