You need to be very motivated to keep up with all the study required/meet deadlines - if you're easily distracted or tend to prioritise other things it may not be the best option for you.
This exactly. A friend of mine started an OU degree 3 years ago, procrastinated with studying in favour of other activities since she "didn't actually have to go to school", and have now basically given up any hope of ever completing it.
IMO, as someone who did A levels completely by herself years ago at home with far less support than distance learning could (allegedly) provide, to do well, you need:
- Planning and the discipline to follow through with it
If, according to your plan, today's going to be a 4-hour study day, you need to sit there for 4 hours studying. No popping by to the store, no surfing Mumsnet, no telling yourself that you'll just do 8 hours another day.
- A certain inclination for the subject you choose
I love maths, and for me, further maths/maths were the easiest to "self-study". Chemistry, on the other hand, was a complete disaster without a tutor I could sit there with for a sort of weekly Q&A session. Yes, some distance learning courses do provide you with a personal tutor. However, from my understanding of it via forum posts of people having undergone that, it's more of a supplementary session for simple, minor questions. Not quite helpful if you ever find yourself completely "lost".
Having said that, distance learning definitely has its merits, especially in terms of flexibility. One thing about your post sticks out to me though.
It would just be doing it for doing its sake, rather than a particular career goal in mind.
This doesn't just apply to DL, but you need to make sure you are definitely interested in the subject you have in mind to prevent so-called "burnout". Many a time, something you're interested in now doesn't necessarily translate to sustained interest once you've got grades and exams to contend with.
Perhaps you could try getting a textbook of whatever subject you're planning to do, sit down with it for a month or so, couple of hours a day, 3-4 days a week, and decide if it's right for you from there?