I've completed the Access to HE Nursing with DLC and am now at university studying Adult Nursing.
The DLC give you very little support so you need to motivate yourself and do loads of research yourself. It is possible, I got nearly all distinctions. Work out your deadline date that you have to get the course finished by and set yourself a timetable, and most importantly stick rigidly to that timetable. I used to give myself one week to read their paperwork and 2 weeks to complete the assignment.
You will need to research subjects on the internet as the information that DLC give you is not sufficient. There are some good reliable websites such as Boundless and BBC, and Khan Academy do some useful YouTube videos.
Good luck