Other forms: fending; fended; fends
If you get along on your own, with no assistance from another person, you can say that you fend for yourself.
A solo hiker on the Appalachian Trail fends for herself, managing the challenges without help. When the verb fend is used this way, it is almost always followed by "for oneself" or "for himself" or "for herself," and it's been in use since the 1600's. It originated as a shortened form of the verb defend, from the Latin root defendere, "to ward off, protect, or guard."