I am a final year Law student at a fairly mediocre university in London and now, at about 4 months before my graduation, have lots of regrets and advice to give to others because of that.
Firstly, I would not encourage young people to study Law in the UK UNLESS they've got their parents working in the field or have got strong connections in the field, to facilitate a job after graduation. Although I am a first class student, attending all events at uni, writing a dissertation, and have done pro-bono legal work throughout my studies, I have not made any connections and I am clueless and jobless at the moment. I know people who graduated last year with first class and are still jobless and living with their parents, no matter how many vacation schemes or internships they had done. That is because the legal jobs market at the moment is overly saturated with tens of thousands of brilliant graduates across the country and only a handful of full-time jobs. And the situation in London is by far the worst!
Secondly, if I haven't put you off studying law yet and you keep reading, and if you do want to study law by all means, here's my advice to successfully doing it. The university choice is the most important. Try to get accepted at a top university if you want to have any chances after graduation. And I don't mean Oxbridge necessarily. In London, there's Queen Mary, UCL, King's, LSE etc. Outside London, the best ones are the ones in the Russell Group (Google it!): Cardiff, Nottingham, Durham etc.
Thirdly, studying law isn't in my opinion as hard as they make it appear. The uni work and assignments are fairly repetitive and mainly consist of you reading a lot for tutorials, writing essays on stuff that doesn't come up again in exams, and (of course) exams at the ending of the year. First year is the best because you'll realise it's the easiest and the friends you make will be there til the end, the second year is the hardest because the subjects will be harder and the number of exams is a bit higher (I usually have 1-2 exams per year, but I had 4-5 exams inmy second year). And third year is a combination of the first two years, because it's really hard keeping up with the massive amount of uni work, but at the same time you get nostalgic about leaving in a few months so you make efforts to meet up with your friends and favourite tutors a lot more.
Lastly, people who study law or are lawyers are NOT heartless at all! Their problem is, because they studied and worked very hard to get there, they most probably sacrificed a lot of their spare time and so they lost bonds with friends, hobbies and people skills, which makes them seem robotic and as lacking personality. You'll see that (and you can try this!) after a few drinks at the pub, in their limited spare time, they become human and heart-full again!
I wish you best of luck getting into law if you really want to do it, because, trust me, it'll be a hell of an adventure that you'll end up enjoying more than you thought you would, because it'll transform you as a person and will help you grow mature!