That is a bit vague, you might want to indicate some areas of interest. There are any number of careers where you could initially do some self study or take a distance learning course or professional exams in order to get into an entry level role.
You mention the OU, yup they have plenty of courses that would be useful for any number of careers, law, IT, statistics etc.. depends what you want do to
there are also online courses from udacity, coursera, EDX
the University of London also has a whole range of distance learning courses run by LSE, SOAS, Kings etc...
There is also Birkbeck which is part of the University of London and runs degree courses part time with evening lectures.
Georgia Tech in the US runs and online computer science MSc, Columbia runs a Data Science MSc... a fair few regular universities in the UK also have distance learning degrees or short courses either vis distance learning or part time or both.
Aside from areas that requires practical/face to face skills - you're not going to learn medicine via distance learning nor are you likely going to become an actor that way... most things are available to you. So you mention you're struggling to think, well maybe have another think without your implicit assumption that there aren't many options - what would you consider doing and post it then people might be better able to help.
