I am sorry. Lonely life isn’t easy. Having said that….

1. If you can’t work a job you want, work some other job. Many people can’t get a job they want

2. Most people don’t live in flats or houses they want. Either can’t afford something better or some other reason why can’t move. If you need a guarantor then it means this flat you want is above your means. Rent a room in a house or in a flat or find a cheaper flat that you could afford and you won’t need a guarantor. I have a family in UK and travel there at least twice a year. Same as in the US if you rent within your means, guarantor isn’t needed

3. You have no references for university, so get a job, get on good terms with co workers and your boss and use them as references and apply next year when you have references. If you already have a job, ask them for references for uni

4. If you are UK citizen, you can obtain a passport. Call passport agency and ask what’s needed. You have some type of misinformation