Law llb

Hi, I want to apply for law at university. I'm interested in family or immigration law for a career. I am thinking of applying for Law LLB because I think it will allow me to specialise in what I want later.
Is this true? Or is that specific to one field too?
Thank you.

I don't know how much you know about the llb structure, but you have to do 7 'compulsory' modules (criminal, public, European, etc.) and then most unis will let you choose some additional modules each year, family law is a pretty common one to offer, but check with the universities that you're thinking of applying to that they regularly offer family law! You will have to choose some other modules as well, but you can tailor your choices so they fit with what you want to do. I'm not sure about immigration law, (as that's slightly more niche I think) but if it isn't offered, law courses will definitely have human rights law or public international law which would fit with immigration law nicely.
It might be worth contacting unis or looking at their websites to see what they offer. They should also give you guidance on choosing modules that are useful for your intended career, but I wouldn't worry too much, you will learn the same skills regardless of which modules you choose, you'll just be learning slightly different cases if you do something else