You will have to prove you’re in a relationship, meet income criteria, level of English etc
At each stage there are fees.
There are fees for everything
And it’s expensive
My partner eventually got permanent to right to remain
But was already in the country on a student visa
The system is very prescriptive. Lots of boxes to tick. And you need to tick them the way they want, with no flexibility hence the advice to work with an Agent
However choosing an Agent is a minefield as many are simply taking advantage and charge ridiculous amounts of £
Adrian Farley was v professional, very fair and got us what we needed
Have a chat with these people. Adrian is v knowledgable and you won’t get ripped off. But it’s a long bureaucratic process as this UK govt doesn’t want people coming here