So i'm trying really hard to not do any of teh main quest or any faction quest (apart for teh few thives guild quest so that i would have a fence in bruma)

any way My quest is for a mythril helm so is there any side quest where soem one will more often than not be wearing a leveled loot helm

currently at level 13 people have started spawning with mythril armour type weapons not so much on bandits but on key side quest enemy people they have myril (brotherhood betrayed and some quest in leyawiin taking you to soem farm hosue up the road to kill soem skoomaers) but none of them had a helm :/

Wait until level 15 or so, then you should be finding them on bandits (or you could go to random settlements and try to find someone with one).