You could have a look at your local University or college prospectus to see if they have any access courses which would allow you to study for a year or so to put you in a position to then be accepted on a course.
Look at their websites....there will certainly be someone who you can contact for advice both about how to get into University and how to get any funding/loans that are available.
OU is brill, and more and more of their courses are being presented online.
I would advise you, K-Lash, to have a look at some of their 10 point, level 1 courses, which let you get the feel of how the OU works without committing yourself. You can count all of them towards a degree.
If you want to do a longer course, then they will allow you to spread payment if you can't afford it all at once.
Either try Open-university (at a cost) or attend college and re-sit your exams, dependant on your age college courses will be free. If you choose the latter help with student loans is available and a part-time job may tide you over.
Either study part time at college to get some A levels, or take an Access course. I completed an Access course in 2002 and then went on to complete a Degree in 2005. I had a student loan and also worked part time. A lot of work, a lot of debt but such a lot of fun! Go for it, it's never to late to start again.