double mickey mouse and one facilitating subject, I personally wouldn't.
Law is definitely soft, memorisation doesn't make a subject hard it just makes it more tedious, compare it to the likes of economics or maths and then you'll see a vast difference.
You're limiting your options with those 3 but if that's what you feel will be best for you right now then fair enough.
History and Maths are great, I'd recommend doing maths or something rather than Law imo, especially if you want to go into accounting/finance/computing