Shall I study in the uk or us?

So basically I have no idea what I want to do in life because i love art but I also like maths and biology, so the reason I’ve been thinking about studying isn’t the us is because I’m pretty sure that you have more time to decide a major.
I was wondering if there is anyone from the uk now going to uni in the us who could tell me a bit about the admissions process, their overall experiences and the advantages and disadvantages.
Any info or opinions from anyone would be massively appreciated.

There are many things to consider based on hundreds of factors. I'll briefly tell you why I chose UK over US for Bachelor's degree.

I am certain of what I want to study and what I'm going to do after uni, so I would much rather spend 3 years studying my subject in depth, getting knowledge that I want to have rather than spending 4 years concentrating on many things about stuff I don't care at all. I also like UK much more. Country has its problems but they're not as ridiculous as what is going on in the US right now. All in all, I will finish my studies year earlier, having more time to start my career.

Although I have to say that for Master's I'm not planning to stay in the UK. I'm thinking about Switzerland/Germany or even the US.

If you have any interests, and you are not sure which one is right for you, perhaps, the US is a better choice for you, but it all depends.

I'd advice you reading the Student Life part on the official website of unis you consider and compare them, finding which one suits you better.