Is it even possible to attain Nirvana?

Sorry, I've just read Satipatthana Sutta (MN 10) and feel a bit overwhelmed. As far as I understand, this is some sort of instruction on how to attain enlightenment. It teaches, that one has to develop the perfect mindfulness of the body, feelings and mind; to observe all the hindrances and be sure that they won't arise anymore; to develop the ending of the aggregates; to abandon the fetter of the senses; to develop all the awakening factors; to contemplate all the arising dharmas considering their relationships with the Four Noble Truths. Beats me, even if one devotes all their life to the perfection of all of these things, can they really perfect these? Attaining Nirvana seems to be really complicated, and there are many conflicting points (both within and between major schools) on what are more important objects of meditation & techniques out there.