i have done the companions quest and they gave me the werewolf gift and then me and aela went to gallows rock to clear it of silver hands,found skjorn dead now she wants me to steal some plans,but how exactly do i make the transformation from man to wolf as and wen i like?none of them bothered to tell me how i do it,i had a brief run as a werewolf after i drank from the blood bowl but then ended up in some pants on my way to gallows rock

no worries i found it

you have to go to your powers page, in spellbook, and then equip the spell that turns you into a werewolf. it belongs to your powers, I forgot the name though. Something with blood.