Hey your sentences are ok, I understand your meaning! Below I have cleaned them up a little. Remember - simple answers are almost always better.
First: I need to go to work to cover next semester's fees as well as have money for myself so I don't need to borrow any.
Second: I need to go out with friends to enjoy watching the full moon from a flat, unlit area to get rid of some life stresses.
** some stress ** some of my life's stresses ** would also be ok. Nice work!