What to do when you feel lost in the world ?

read a book/get back to education.
have some entertainment alongside, like music, will be good.
or you can try to find a job to do.
but people find their drive not on these things;
they find their drive by remembering who they are, then a purpose is found.
it's an initial response. by remembering who you are, you can create and achieve greater things.
start asking yourself what do you want in your life, then good things may be found.

Find interests that may want you to lead to do bigger things and look foreard to

Let me know if you find out.