We've met, we've been dating for over a year and we got engaged when she came here last which was in May last year

I am in need of help. Me and my fiancee plan on her moving to England with me and getting married with me, I'm currently on ESA and PIP and cannot work, can anyone give me advice as to how I get her here, like what visas do i need and how much would everything cost and what i'd need for the visas. I ...