Fear in succeeding

I graduated two years ago with a bachelors in English Communications and is applying to a few direct entry accelerated MSN programs for non-nursing backgrounds. I have no prior experience in nursing and have not done well in the past in sciences or maths. I want to pursue this because I want a rewarding career that I can find fullfilling and pays well. Nursing has always interest me, but I fear because of my weakness in science I may not be able to do well in the program. Does anyone have any suggestions for me.