do i have to use glass to ferment my jaom or is there another material jug i can use???
Depends on what you're gonna do with it once the ferment has finished........
Yes, you could normally use something made of HDPE, PET or Polycarbonate. Leave it till the fruit has dropped and then decant/rack into glass for ageing.
I do like to get mine off the yeast - so it's up to you, if you start it in glass, then still rack it off the yeast/fruit once the fruits dropped. You'll find that bread yeast is probably the best, as someone else already pointed out, wine yeast will ferment it dry. IMO it's better sweet.
Bread yeast doesn't flocculate very well, so rack off as much as you can that is clear, then syphon off the rest of the mead (not the yeast of course), and if it's cloudy you can just put the last bit of cloudy mead into a jar and let it settle for a couple of days. That will reduce any racking losses.
Dunno if that's any help or not........
regards
fatbloke