Scared To Start A Career ?

So all my life I’ve wanted to become a nurse, but everytime time i get the courage to start it i always find an excuse to back out. First it was me being a working mom, then it was me being scared to take the test, then it went back to being scared to take the chance at doing it cause i don’t know how to balance work,school & children. (I don’t have a support system). I’ve been a CNA/ Med tech for over 10 years working in nursing and assisted living and i recently lost my job and lately I’ve been thinking more about an actual career. But then the fear comes in heavy and i don’t know what to do. I’m scared of failing. But i also fear not making anything with myself