Well there isn't really "something" in law - you either want to become a qualified solicitor or barrister, or you don't. The former currently require a law degree, the latter obviously does not.
In any case, Law doesn't really have an specific course requirements, so take the ones you enjoy the most and are most likely to do well in. Things to consider are how your particular style of learning conforms to each course - if you don't want to do oral presentations, avoid French (also probably English Lit, although I'm not 100% certain); if you find lab sessions and writing up lab reports extremely boring, don't do sciences; if you hate writing essays, avoid Psychology and English, etc, etc.
While essay subjects can be helpful for preparing you for when you being a degree in law, they won't be necessarily better for actually getting accepted onto such a degree - and many students go into these courses with a background in sciences rather than essay subjects and do very well.