My first piece of advice is that I would not recommend doing any degree because you think it will be 'easy', nor do I think you should specifically avoid a law degree because you think it will be 'hard'. In terms of recruitment and prospects of obtaining a training contract or pupillage, whether you do a law degree or non law degree and convert does not matter at all. For quite a long time now the number of new trainees and pupils with law and non law degrees has been about even.
That means that you need to make the right decision for you. A law degree being 'hard' is not a good reason, not least because you can't actually avoid studying law. The GDL is a much more intense year of study than any individual year on a law degree, and whilst you may be better equipped to deal with that after three or four years at university, the fact remains that you have to study law at some point. I actually didn't enjoy studying law at all, and studying for a law degree is very, very different to practising as a lawyer. So not doing a law degree because you might not be suited to it is fine. I do think that most of those who have realistic ambitions of becoming lawyers should be able to apply themselves and do well in a law degree irrespective, but it's not for everyone. However, if you are going down the non law degree route I would certainly recommend something that you are actively interested in, and something which you think will actually benefit you. Sociology may be something you're interested in, but will it benefit you? I see a lot of non law degrees on pupillage applications, but they tend to be the likes of History, English, languages etc. I don't see a lot of so called 'softer subjects'. I think the reason for that is simply that not many candidates who are serious about being lawyers (or barristers, at least) realistically see studying those subjects as being a part of their development.
But again, that may be different for you, and if you genuinely do see a Sociology degree as being part of that for you, then fine. But what you really need to avoid is trying to somehow find a shortcut through this process. That's how your post comes across, and I'm afraid that simply isn't possible. Law is a competitive career path which requires you to apply yourself well and continuously develop relevant skills over a period of years. It doesn't require you to study a law degree, but it does require you to have the drive and ambition to deal with that competition, and to continually better yourself. Trying to find an easy route in simply isn't compatible with that. So as I say, this isn't me telling you not to do a Sociology degree, or to do a law degree. What to study is your own choice, but make it for the right reasons and with a realistic view as to the demands of the career path that you're starting down.