You can't just change your job, there is no such thing as a bountiful selection of high-paying jobs available. And even if there were, somebody still has to do all the lower paid jobs that don't pay enough to survive.
So change your job. And give up coffees
I bought my first house in the 80's, 60k, 2 bed flat. Salary was ยฃ12.5k. Needed a lodger to pay the mortgage, Fixed 10% i.e. half of my salary on interest. ยฃ500 a month on interest, mortgage was ยฃ700 a month. Lodger paid ยฃ300 or I couldnt have done it.
Lived on Asda 6p tins of spagetti, a 28p loaf and tub of margerine for a year 6 days a week, roast on Sunday.