VPN explain me like im five

So I tried several VPN providers with the goal of streaming uk stuff, but I guess Im too dumb to make it.

I install the VPN App, I choose a UK IP adress, but still the contents are blocked for me.

Is it because I try it via the official streaming offers like BBC Sounds?
Or does it simply not work with Android?

For the instance I would like to watch the England match tonight.

How would I proceed to achieve it?

Thanks in advance from a middle aged, technically lost guy.

So all the endless VPN chatter is all a lie?