Tanking is not too hard. Range pull (enmity) + AoE (enmity) x 3. Then DPS each of the mobs after run and position yourself facing the group. Do the same for boss, except that you might need to use your dmg mitigation cooldown a bit here. Once you are comfortable with holding the enmity, gauge the healer capability, if all good, swap to dps stance to help kill them faster.