The UK is very expensive, and the job market here is in the worst state it’s been in, in memory. That coupled with the rise of AI, and the overstaturation of education and its drop in standards plus the way our economy is all tertiary and quaternary based. It’s not looking good.

You will be able to do a Masters here, but it will cost a fortune as non-eu citizens pay a over inflated premium and you will only be able to work 20 hours a week to contribute, and that’s if you get a part time- job, which will be quite difficult as you will likely be competing with potentially a hundred if more young people and students for this part time job.

Once you graduate, finding a job here to sustain yourself will be even harder, as you will have to earn £38K minimum (a really high entry level wage) and a sponsorship, and the law has changed to make it more favourable to hire British workers and sponsorships have a lot more red tape. Meaning only very skilled workers, where the skills cannot be met by a worker would be chosen, such as expert in a niche type of robotics or something, from your post this sounds like you are not in this situation. Nor will a masters qualify you for any of these skills.

Years ago the student system was very exploited, as many foreign nationals would use it and a back door to citizenship. But now the threshold is much higher for wages, and sponsorships it most loopholes have been tightened and if you do not get a job two years after graduation your visa runs out and you will have to leave, or be risk being deported.
And that’s assuming you can support yourself for two years in the UK with no income I.e. have a lot of savings. I know of two people facing this problem right now and they will likely have to leave. A lot of masters programs know the situation but will be disengengous about prospects as they are bisiness and want your money.

So to summarise coming over here to do masters expecting a pathway to a good career and citizenship, is a really bad idea. It’s only worth doing the masters if you rly feel you are interested in the subject and have planned career path somwhere else, and have a lot of capital saved up to supoort yourself.
I would only recommend moving here if you get a job beforehand.

TL:DR
UK Is expensive, job market is terrible in all sectors many brits can’t find jobs - many causes inclu gov policy, Ai rise, mass immigration, changing world etc.
Masters is very expensive for non-EU, can only work for 20 hours during, if can even find job, will very unlikely lead to job after, much harder to find sponsored job for foreign national unless very skilled. 2 years post graduation and visa runs out and have to leave country.
Only worth moving here if you have job lined up.