i'm tired

see, im confused about some things. how do i know what i want to do in my life? im not really asking for any answers here, its just some thoughts thats been circling in my mind for maybe my whole life? like ive always told myself and others "oh i want to do this!" "no wait this is what i want to do!" but eventually its gotten to a point where i ask myself, "can i even do one thing today?"
im only 16, and yet i am trying so hard to keep up with time. i cant find a passion for what i want to do anymore, and i wonder if its because of this world we live in. but i suppose thats a different topic.
overall, this behavior should not be normalized. not at all. i know that there is at least someone who can agree on it. i hope one day i can *really* get back up and start all over for the best