midas magic,help

hey all,evrything works fine but am looking for help,
where to summon portal to oblivion! when i try to enter it it says tamriel world space
astral realm quest,what to do after awake the great crystals,because the quest is still not finished,the secret door is now open
and i can go to all the places now 14 of them,is there more to explorer?
also what to do with Leviathan(fish)it attacks me so i killed but i got nothing from it!
the quest witht the skeep am stuck to,when i try to bring him back it runs away from me
where to find Aylied warrior...Emero-el....eldritch....
cant find them

found it for the portal to oblivion,when i try to enter it i was in town,soon as a get out of town i could enter it,
still looking where to find the other things