So "What do you want?" is "I want to live in the UK". I could be wrong, but I'm guessing that where you live trumps what you do here. It's probably worth asking yourself why you want to live there, but I presume there's a good answer (family, love the culture, etc).
So the next question is, "What kind of work skills will get me a job and a clean work visa in the UK?" This means the people you should be talking to are recruiters who bring people from your country to the UK to work in your field, to find out what they're looking for. You should also be talking to other programmers with a similar background to yours who made the transition you want to make, to find out what worked for them and what mistakes they made.
Unless you have a specific place you want to be (say, London), you should figure out where in the UK you want to be. It's a big place with a wide variety of culture and living conditions. From there, you can start looking at employers in the area, figure out what they're looking for.
So the next question is, "What kind of work skills will get me a job and a clean work visa in the UK?" This means the people you should be talking to are recruiters who bring people from your country to the UK to work in your field, to find out what they're looking for. You should also be talking to other programmers with a similar background to yours who made the transition you want to make, to find out what worked for them and what mistakes they made.
Unless you have a specific place you want to be (say, London), you should figure out where in the UK you want to be. It's a big place with a wide variety of culture and living conditions. From there, you can start looking at employers in the area, figure out what they're looking for.